Block boy getting fruit (6)
I believe the answer is:
damson
'fruit' is the definition.
(damson is a kind of fruit)
'block boy' is the wordplay.
'block' becomes 'dam' (damming is a kind of blocking).
'boy' becomes 'son' (male child).
'dam'+'son'='DAMSON'
'getting' is the link.
(Other definitions for damson that I've seen before include "fruit tree" , "might one be in a jam?" , "Nomads (anag)" , "Dark purple plum" , "Type of plum" .)