Cause embarrassment to a party (5)

I believe the answer is:

abash

'cause embarrassment' is the definition.
(to abash someone is to make them embarrassed)

'a party' is the wordplay.
'party' becomes 'bash' (term for a party or celebration).
'a'+'bash'='ABASH'

'to' is the link.

(Other definitions for abash that I've seen before include "Cause to feel 4" , "Bring shame on" , "Cause embarrassment" , "Cause to feel ashamed" , "show up" .)

I've seen this clue in The Telegraph and The Guardian.

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