Venetian island tailor recollected (6)
I believe the answer is:
rialto
'venetian island' is the definition.
(I've seen this before)
'tailor recollected' is the wordplay.
'recollected' is an anagram indicator.
'tailor' anagrammed gives 'RIALTO'.
(Other definitions for rialto that I've seen before include "Old mercantile area of Venice" , "famous city district" , "Region in Venice and Dublin" , "Venetian district" , "Bridge in Venice and Dublin" .)