Visit tiny empty church, work of art (8)
I believe the answer is:
triptych
'work of art' is the definition.
(I've seen this before)
'visit tiny empty church' is the wordplay.
'visit' becomes 'trip' (trip can mean a visit or holiday somewhere).
'empty' means to remove the middle letters.
'church' becomes 'ch' (common abbreviation).
'tiny' with its middle taken out is 'ty'.
'trip'+'ty'+'ch'='TRIPTYCH'
(Other definitions for triptych that I've seen before include "Three-panelled picture" , "Three-panelled painting" , "Picture with three sections" , "Three-part picture" , "panel" .)