Exclamation of delight (3)

I think it could be either:

ooh

aah

'exclamation of delight' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for ooh that I've seen before include "sound excited" , "My goodness!" , "Exclamation of delight" , "expression of delight" , "Expression of surprise" .)

I've seen this clue in The Telegraph.

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