Squabbles back in the gasworks (4)
I believe the answer is:
rows
'squabbles' is the definition.
(I've seen this in another clue)
'back in the gasworks' is the wordplay.
'back' is a reversal indicator.
'in' says the answer is hidden in the clue.
'swor' is hidden in the letters of 'gasworks'.
'swor' written backwards gives 'ROWS'.
(Other definitions for rows that I've seen before include "Rackets" , "Quarrels; ranks" , "Arguments" , "emotional exchanges" , "Puts one's oar in" .)