Principal (10)
'principal' is the definition.
(both can mean major)
This is all the clue.
(Other definitions for main that I've seen before include "Salt water" , "river in Germany" , "associated with the Spanish?" , "Source of electricity" , "one might expect tap water from it" .)
'principal' is the definition.
(I know that principal can be written as star)
This is all the clue.
(Other definitions for star that I've seen before include "Top celebrity" , "Eg, Antares" , "Main attraction" , "Astronomer - dreamer" , "- - of Bethlehem" .)
'principal' is the definition.
(I know that principal can be written as lead)
This is all the clue.
(Other definitions for lead that I've seen before include "Take a position in front" , "One with starring role" , "Actor playing the principal role" , "Call the shots" , "Be in charge of, element" .)
'principal' is the definition.
(as in arch-enemy)
This is all the clue.
(Other definitions for arch that I've seen before include "Structural curve" , "Prefix meaning chief - maybe an angel" , "Clever" , "Roguish - chief - supporter" , "Annoyingly playful" .)
'principal' is the definition.
(I know that head is a type of principal)
This is all the clue.
(Other definitions for head that I've seen before include "Edible part of cabbage" , "Person in charge" , "See 14" , "Leader; stream source" , "River source; promontory" .)
'principal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for major that I've seen before include "Important - ex-PM" , "Of great importance" , "Not minor" , "See 2" , "Big - PM" .)
'principal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for prime that I've seen before include "Main; indivisible number" , "Chief or most important, like a minister" , "Chief or best quality" , "Prepare to fire - first" , "Brief" .)
'principal' is the definition.
(I know that principal can be written as chief)
This is all the clue.
(Other definitions for chief that I've seen before include "Key" , "Person in charge, head" , "Leader, head" , "Head of a native American tribe" , "Organisation head" .)
'principal' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for staple that I've seen before include "Short U-shaped paper fastener" , "Pleats in a paper pin" , "Paper pin - basic" , "Important; paper fastener" , "Fastening wire" .)
'principal' is the definition.
(I know that headmaster is a type of principal)
This is the entire clue.
(Other definitions for headmaster that I've seen before include "Principal" , "School manager" , "Top (male) teacher" .)
'principal' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for leading that I've seen before include "Prominent" , "Female top of the bill" , "Aligned in front" , "in van" , "In the vanguard" .)