Working party (5)
'working party' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for squad that I've seen before include "Small group of soldiers or police" , "Sporting team - police unit" , "Group (of soldiers, players etc)" , "Crew" , "Small group or team" .)
I believe this is a double definition.
'working' is the first definition.
'party?' is the second definition.
(I know that Labour is a type of labor party)
(Other definitions for labour that I've seen before include "Hard work, toil" , "Donkey-work" , "Workforce" , "Painful time" , "Workers" .)