Unpleasant task in branch or elsewhere (5)
I believe the answer is:
chore
'unpleasant task' is the definition.
(I've seen this before)
'in branch or elsewhere' is the wordplay.
'in' indicates the answer is hidden within the clue.
'CHORE' is hidden in the letters of 'branch or elsewhere'.
(Other definitions for chore that I've seen before include "Tedious routine task" , "Boring job" , "Boring task" , "unwelcome task" , "A household or routine task" .)