Crossword Genius

Mark and I interrupt Stan (5)

Ross

I believe the answer is:

stain

'mark' is the definition.
(synonyms)

'i interrupt stan' is the wordplay.
'interrupt' indicates putting letters inside.
'i' inserted inside 'stan' is 'STAIN'.

'and' acts as a link.

(Other definitions for stain that I've seen before include "Spot - shame" , "Satin (anag.)" , "Smear" , "Discoloration" , "Black mark for saint" .)

I've seen this clue in the Evening Standard.
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