Barriers no problem for fruit (6)
I believe the answer is:
damson
'for fruit' is the definition.
(damson is a kind of fruit)
'barriers no problem' is the wordplay.
'barriers' becomes 'dams' (dam is a kind of barrier).
'problem' indicates anagramming the letters.
'no' with letters rearranged gives 'on'.
'dams'+'on'='DAMSON'
(Other definitions for damson that I've seen before include "Type of plum" , "Stone fruit for nomads" , "Acid purple plum" , "Plum-coloured" , "Kind of plum for nomads" .)