Rook stuck in a French vase (3)
I believe the answer is:
urn
'vase' is the definition.
(urn is a kind of vase)
'rook stuck in a french' is the wordplay.
'rook' becomes 'r' (abbreviation in chess).
'stuck in' means one lot of letters goes inside another.
'a french' becomes 'un' ('a' in French).
'r' placed into 'un' is 'URN'.
(Other definitions for urn that I've seen before include "Tall vase with stem" , "Without cost; last word of Tempest" , "Vaselike vessel on a pedestal" , "Large vessel, for tea perhaps" , "Funereal vase" .)