Unusually kind to accept most of fee cut (6)
I believe the answer is:
knifed
'cut' is the definition.
(I've seen this before)
'unusually kind to accept most of fee' is the wordplay.
'unusually' is an anagram indicator.
'to accept' indicates putting letters inside.
'most of' means to remove the last letter.
'kind' with letters rearranged gives 'knid'.
'fee' with its final letter taken away is 'fe'.
'knid' going around 'fe' is 'KNIFED'.
(Other definitions for knifed that I've seen before include "Cut" , "Stabbed with intent to harm or kill" , "deceived furtively" .)