Ruin suit (2,3)

I believe the answer is:

do for

I believe this clue is a double definition.

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

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

(Other definitions for do for that I've seen before include "Ruin" , "Destroy or kill" , "suit" .)

I've seen this clue in The Times and The Telegraph.

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