Crossword Genius

Tons with motive for betrayal (7)

Ross

I believe the answer is:

treason

'for betrayal' is the definition.
(synonyms)

'tons with motive' is the wordplay.
'tons' becomes 't'.
'with' says to put letters next to each other.
'motive' becomes 'reason' (reason is a kind of motive).
't'+'reason'='TREASON'

(Other definitions for treason that I've seen before include "Mutiny" , "Gunpowder Plot, say" , "Senator (anag)" , "rebellion" , "attempting to overthrow the king" .)

I've seen this clue in The Telegraph.
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