Crossword Genius

An advertisement for pastry? (4)

Ross

I believe the answer is:

puff

This clue is a double definition.

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

'for pastry?' is the second definition.
(puff is a kind of pastry)

(Other definitions for puff that I've seen before include "Short burst of air" , "Smoke - light pastry" , "Quick emission of smoke etc" , "Advertisement; smoke a cigarette" , "type of pastry" .)

I've seen this clue in the Evening Standard.
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