Ace party? Shame! (5)

I believe the answer is:

abash

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Here is my best explanation:

'shame' is the definition.
(thesaurus)

'ace party?' is the subsidiary indication.
'ace' becomes 'a'.
'party?' becomes 'bash' (bash is a kind of party**).
'a'+'bash'='abash'

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This clue was last seen in The Telegraph

(Other definitions for abash that I've seen before include "bring shame", "Disconcert", "Shame", "disgrace", "Humiliate", "Cause embarrassment", "Embarrass", "Crush", "show up" and "put one to shame".)

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