Ladder positioned vertically, build quickly (3,2)

I believe the answer is:

run up

'build quickly' is the definition.
(run up can mean to make quickly)

'ladder positioned vertically' is the wordplay.
'ladder' becomes 'run' (synonyms).
'positioned vertically' becomes 'up'.
'run'+'up'='RUN-UP'

(Other definitions for run up that I've seen before include "Cricketing approach?" , "To make or mend hastily" , "Bowler's approach" , "Quickly create" , "Go to the top of steps" .)

I've seen this clue in The Times.

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