Short trip to perform a task for Darren, possibly (6)
I believe the answer is:
errand
'short trip to perform a task' is the definition.
(I've seen this before)
'darren possibly' is the wordplay.
'possibly' indicates anagramming the letters.
'darren' is an anagram of 'ERRAND'.
'for' is the link.
(Other definitions for errand that I've seen before include "light task" , "Short journey on behalf of another" , "Short trip to perform required task" , "Journey to deliver message etc" , "Charge - mission" .)