No good growing tiny fruit (6)
I believe the answer is:
raisin
'tiny fruit' is the definition.
'raisin' can be an answer for 'fruit' (raisin is a kind of fruit). I am not certain of the 'tiny' bit.
'no good growing' is the wordplay.
'no' suggests deleting specific letters.
'good' becomes 'g' (abbreviation).
'growing' becomes 'raising' ('raise' can be a synonym of 'grow').
'raising' with 'g' taken away is 'RAISIN'.
Can you help me to learn more?
(Other definitions for raisin that I've seen before include "A dried grape, nice in cake" , "An iris (anag)" , "Somewhat dry fruit" , "Cultivating" , "Dried grape used in cakes" .)