A host of drinkers celebrate secret bottles (9)
I believe the answer is:
innkeeper
'a host' is the definition.
(I know that host can be written as innkeeper)
'celebrate secret bottles' is the wordplay.
'celebrate' becomes 'keep' (synonyms).
'secret' becomes 'inner' (as in one's inner thoughts).
'bottles' means one lot of letters goes inside another (bottle can mean to contain).
'keep' inserted inside 'inner' is 'INNKEEPER'.
'of drinkers' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for innkeeper that I've seen before include "Pub landlord" , "Publican" , "Accommodating type" , "For example, Mistress Quickly" , "Manager who made extra provision for visitors" .)