Excessive amount (5)
'excessive amount' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for surfeit that I've seen before include "stuff, once" , "Overindulgence" , "excessive amount" , "Excess, glut" , "having had quite enough" .)
'excessive amount' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for spate that I've seen before include "Sudden increased quantity" , "A torrent of tapes" , "Sudden forceful flow" , "A sudden flood or rush" , "Sudden river flood" .)
'excessive amount' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for too much that I've seen before include "More than is reasonable" , "Beyond endurance" , "Excessive, overwhelming" , "American expression of approval" , "More than enough" .)
'excessive amount' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for plethora that I've seen before include "opposite of scarcity" , "(A) glut (of something)" , "'Large, perhaps excessive, amount (8)'" , "Large number" , "Cornucopia -- superfluity" .)