Leave some mangetouts (3,3)
I believe the answer is:
get out
'leave' is the definition.
('get out' can be a synonym of 'leave')
'some mangetouts' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'GET-OUT' is hidden within 'mangetouts'.
(Other definitions for get out that I've seen before include "Clear off! - escape" , "become known" , "Excuse" .)