Pubs full of unusually clean stickers (9)
I believe the answer is:
barnacles
'stickers' is the definition.
(barnacles stick or cling to rocks)
'pubs full of unusually clean' is the wordplay.
'pubs' becomes 'bars' (I've seen this before).
'full of' indicates putting letters inside.
'unusually' is an anagram indicator.
'clean' with letters rearranged gives 'nacle'.
'bars' going around 'nacle' is 'BARNACLES'.
(Other definitions for barnacles that I've seen before include "Balancers for shellfish that stick to hulls" , "crusty lodgers" , "Geese" .)