Endlessly bringing up fruit (6)
I believe the answer is:
raisin
'fruit' is the definition.
(raisin is a kind of fruit)
'endlessly bringing up' is the wordplay.
'endlessly' means to remove the last letter.
'bringing up' becomes 'raising' (synonyms).
'raising' with its final letter taken off is 'RAISIN'.
(Other definitions for raisin that I've seen before include "Cultivating" , "Dried grape used in cakes" , "fruit product" , "A dried grape, nice in cake" , "A dried grape used in cake" .)