Man of cloth in Rialto drunk (6)
I believe the answer is:
tailor
'man of cloth' is the definition.
(I've seen this in another clue)
'rialto drunk' is the wordplay.
'drunk' indicates an anagram.
'rialto' anagrammed gives 'TAILOR'.
'in' acts as a link.
(Other definitions for tailor that I've seen before include "Cut" , "One makes suits etc. to measure" , "Specially adapt" , "Maker of clothes for men" , "fitter" .)