Begin meal without starter of anchovy (6)
I believe the answer is:
launch
'begin' is the definition.
(I know that launch is a type of begin)
'meal without starter of anchovy' is the wordplay.
'meal' becomes 'lunch' (lunch is a kind of meal).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'starter of' suggests taking the first letters.
The first letter of 'anchovy' is 'a'.
'lunch' enclosing 'a' is 'LAUNCH'.
(Other definitions for launch that I've seen before include "Large motorboat" , "Begin (a project)" , "Set up - found" , "Begin; motor boat" , "Fire (a rocket)" .)