Quickly stuck (4)
I believe the answer is:
fast
I believe this is a double definition.
'quickly' is the first definition.
(synonyms)
'stuck' is the second definition.
(both can mean secure)
(Other definitions for fast that I've seen before include "Refuse to eat - quickly" , "Go without food" , "firm to > go without" , "Abstain from food/drink" , "sort of convenience food" .)