Not all greengages will be found charming (6)
I believe the answer is:
engage
'found charming' is the definition.
I can't judge whether this defines the answer.
'not all greengages will' is the wordplay.
'not all' indicates a hidden word (only some of the letters).
'ENGAGE' is hidden in the letters of 'greengages will'.
'be' is the link.
Can you help me to learn more?
(Other definitions for engage that I've seen before include "Secure" , "Take on - reserve - promise" , "Take into service or commit to marriage" , "Morally committed to" , "Recruit" .)