Quickly fixed (4)

I believe the answer is:

fast

I believe this is a double definition.

'quickly' is the first definition.
(synonyms)

'fixed' is the second definition.
(synonyms)

(Other definitions for fast that I've seen before include "Flying" , "Quick - don't eat" , "Refuse to eat - quickly" , "Go hungry" , "Quick; firmly fixed" .)

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

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