Crossword Genius

Force isn't weak (5)

Ross

I believe the answer is:

faint

'weak' is the definition.
(I've seen this before)

'force isn't' is the wordplay.
'force' becomes 'f' (symbol used in Physics e.g. f=ma).
'isn't' becomes 'aint' (I've seen this before).
'f'+'aint'='FAINT'

(Other definitions for faint that I've seen before include "(Of a chance) slight" , "Indistinct - pass out" , "hard to hear" , "woozy" , "Barely perceptible" .)

I've seen this clue in The Telegraph.
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