Crossword Genius

Against main force in Split (4)

Ross

I believe the answer is:

torn

'split' is the definition.
(I've seen this in another clue)

'against main force' is the wordplay.
'against' becomes 'to' (as in a lean-to, building leaning against anothe).
'main force' becomes 'RN' (abbreviation for Royal Navy, Main is a sea).
'to'+'rn'='TORN'

'in' acts as a link.

(Other definitions for torn that I've seen before include "Ripped - undecided" , "Removed forcibly" , "Rent, ripped" , "Divided" , "Having rips" .)

I've seen this clue in The Sun.
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