Fruit produced by mother and offspring (6)
I believe the answer is:
damson
'fruit' is the definition.
(damson is a kind of fruit)
'mother and offspring' is the wordplay.
'mother' becomes 'dam' (female parent of an animal).
'and' says to put letters next to each other.
'offspring' becomes 'son' (son is a kind of offspring).
'dam'+'son'='DAMSON'
'produced by' acts as a link.
(Other definitions for damson that I've seen before include "Small plum-like fruit" , "Nomads (anag)" , "fruit tree" , "Small dark-purple plum" , "Acid purple plum" .)