Mark secretly a fashionista, in a way (5)

I believe the answer is:

stain

'mark' is the definition.
(synonyms)

'secretly a fashionista in a way' is the wordplay.
'secretly' indicates the answer is hidden within the clue.
'STAIN' can be found hidden inside 'fashionista in way'.

(Other definitions for stain that I've seen before include "Penetrative dye; mark" , "Smear" , "Taint" , "Black mark for saint" , "Discoloured patch" .)

I've seen this clue in The Irish Times.

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