The man's in a club that's tacky (8)
I believe the answer is:
adhesive
'tacky' is the definition.
(I've seen this before)
'the man's in a club' is the wordplay.
'the man's' becomes 'hes' (he's).
'in' indicates putting letters inside.
'club' becomes 'dive' (I've seen this in other clues**).
'a'+'dive'='adive'
'hes' put into 'adive' is 'ADHESIVE'.
'that's' is the link.
(Other definitions for adhesive that I've seen before include "Substance that sticks" , "It sticks things together" , "very clingy" , "Tending to stick" , "Tacky" .)