Crossword Genius

Force going with battle group (7)

Ross

I believe the answer is:

faction

'group' is the definition.

'force going with battle' is the wordplay.
'force' becomes 'F' (symbol used in Physics e.g. f=ma).
'going with' is a charade indicator (letters next to each other).
'battle' becomes 'action' (military action).
'f'+'action'='FACTION'

(Other definitions for faction that I've seen before include "Rebellious group" , "band" , "Dissenting group within a larger one" , "Wing" , "part of party" .)

I've seen this clue in The Sun.
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