"That hits the spot!" (3)

I think it could be either:

aah

ahh

'that hits the spot' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for aah that I've seen before include "Expression of appreciation or amazement" , "Expression of surprise" , "regular partner of 3 [OOH]" .)

I've seen this clue in The New York Times and the Universal.

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