Conference side failing to finish attack (5-2)

I believe the answer is:
teach-in
'conference' is the definition.
(I've seen this before)
'side failing to finish attack' is the wordplay.
'side' becomes 'team' (a side is a sporting team).
'failing to finish' means to remove the last letter.
'attack' becomes 'chin' (to hit someone on the chin).
'team' with its last letter taken away is 'tea'.
'tea'+'chin'='TEACH-IN'
I've seen this clue in The Times.
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