Endlessly putting up dried fruit (6)
I believe the answer is:
raisin
'dried fruit' is the definition.
(raisin is a kind of dried fruit)
'endlessly putting up' is the wordplay.
'endlessly' means to remove the last letter.
'putting up' becomes 'raising' ('raise' can be a synonym of 'put up').
'raising' with its final letter taken off is 'RAISIN'.
(Other definitions for raisin that I've seen before include "Dried 18" , "sultana, say" , "Dried grape used in cakes" , "fruit product" , "Dried red grape" .)