Gang to work around start of roadworks (5)
I believe the answer is:
troop
'gang' is the definition.
(I've seen this before)
'to work around start of roadworks' is the wordplay.
'work' becomes 'op' (abbreviation for opus**).
'around' means one lot of letters goes inside another.
'start of' indicates taking the first letters.
The first letter of 'roadworks' is 'r'.
'to'+'op'='toop'
'toop' going around 'r' is 'TROOP'.
(Other definitions for troop that I've seen before include "Force" , "musical group perhaps" , "Squad" , "March" , "Large group (of soldiers?)" .)