Drunk held firmly (5)
I believe the answer is:
tight
'firmly' is the definition.
(synonyms)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for tight that I've seen before include "Close-fitting; drunk" , "Stretched" , "Parsimonious" , "reluctant to buy a round?" , "Well oiled" .)