Hemp brought back from Douglas Island (5)
I believe the answer is:
sisal
'hemp' is the definition.
(I've seen this before)
'brought back from douglas island' is the wordplay.
'brought back' is a reversal indicator.
'from' says the answer is hidden in the clue.
'lasis' is hidden within 'douglas island'.
'lasis' in reverse letter order is 'SISAL'.
(Other definitions for sisal that I've seen before include "Plant fibre used for making rope" , "Fibre from agave plant" , "Fibre-yielding plant" , "Ropemaker" , "Strong rope fibre" .)