Crossword Genius

Many an advert seems crazy! (3)

Ross

I believe the answer is:

mad

'crazy' is the definition.
(I know that crazy can be written as mad)

'many an advert' is the wordplay.
'many' becomes 'm' (Roman numeral for a thousand).
'an advert' becomes 'ad' (synonyms).
'm'+'ad'='MAD'

'seems' acts as a link.

(Other definitions for mad that I've seen before include "Insane - furious" , "Crazed" , "lunatic" , "Frenzied" , "like the March Hare" .)

I've seen this clue in the Evening Standard.
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