Crossword Genius

Gradual increase (5-2)

Ross

I believe the answer is:

build-up

'gradual increase' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for build-up that I've seen before include "Gradual increase" , "Preliminaries leading to a climax" .)

I've seen this clue in the Sydney Morning Herald, The Guardian and The Mirror.
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