Crossword Genius

Overthrow permitted for two (7)

Ross

I believe the answer is:

couplet

'two' is the definition.
(couplet is a kind of two)

'overthrow permitted' is the wordplay.
'overthrow' becomes 'coup' (I've seen this in another clue).
'permitted' becomes 'let' (to let something happen is to permit it).
'coup'+'let'='COUPLET'

'for' acts as a link.

(Other definitions for couplet that I've seen before include "bit of poetry" , "Two successive lines of verse, usually rhyming" , "Two lines of verse, often rhyming" , "Pair of lines in poetry" , "piece of poetry" .)

I've seen this clue in The Telegraph.
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