Tiny bird heard in French city (6)
I believe the answer is:
rennes
'french city' is the definition.
(I've seen this before)
'tiny bird heard' is the wordplay.
'tiny bird' becomes 'wren' (I've seen this before).
'heard' indicates a 'sounds like' (homophone) clue.
'wren' sounds like 'RENNES'.
'in' is the link.
(Other definitions for rennes that I've seen before include "Major town in Brittany" , "City of NW France" , "Hurries" , "City of Brittany" , "French city" .)