Some cafes' talented clientele get merry (6)
I believe the answer is:
festal
'merry' is the definition.
(thesaurus)
'some cafes' talented clientele' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'FESTAL' is hidden in the letters of 'cafes talented clientele'.
'get' acts as a link.
(Other definitions for festal that I've seen before include "Jovially celebratory" , "Relating to a holiday" , "Jovial" , "Relating to a festival; joyous" , "Joyous, festive" .)