Crossword Genius

Put Up, Up and Away under film, raising tempo initially, and cause a violent reaction (4,3,3)

Ross

I believe the answer is:

push too far

'cause a violent reaction' is the definition.
(pushing someone too far might cause a reaction)

'put up up and away under film raising tempo initially' is the wordplay.
I cannot quite understand how this works, but
'and' could be 'too' and 'too' is present in the answer.
'away' could be 'a' (abbreviation as used in sports fixtures) and 'a' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'and' is the link.

I've seen this clue in The Guardian.
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