Stew at ball? A delicate matter (3,6)

I believe the answer is:

hot potato

'a delicate matter' is the definition.
(I've seen this before)

'stew at ball?' is the wordplay.
'stew' becomes 'hotpot' (I've seen this before**).
'ball?' becomes 'o'.
'hotpot'+'at'+'o'='HOT POTATO'

(Other definitions for hot potato that I've seen before include "Is one warm in one's jacket" , "Awkward thing" , "troublesome affair" , "Troublesome situation concerning thermal spud" , "Awkward matter" .)

I've seen this clue in The Telegraph.

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