Press some courgettes (4)
I believe the answer is:
urge
'press' is the definition.
(I know that press can be written as urge)
'some courgettes' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'URGE' is hidden in the letters of 'courgettes'.
(Other definitions for urge that I've seen before include "Encourage (to do something)" , "Advise earnestly, prod" , "Press to do something" , "Advocate" , "Try hard to persuade, advise earnestly" .)