Much favourable publicity for high-rise construction (5-2)

I believe the answer is:

build-up

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'much favourable publicity for high-rise construction' is the definition.
I can't judge whether this definition defines the answer.

'much favourable publicity for high' is the wordplay.
'much favourable publicity for' becomes 'build' (I can't justify this - if you can you should believe this answer much more).
'high' becomes 'up' (associated in meaning).
'build'+'up'='BUILD-UP'

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

I've seen this clue in The Globe and Mail.

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