Table part of provisional tariff (5)
I believe the answer is:
altar
'table' is the definition.
(altar is a kind of table)
'part of provisional tariff' is the wordplay.
'part of' indicates a hidden word.
'ALTAR' can be found hidden inside 'provisional tariff'.
(Other definitions for altar that I've seen before include "Sacrificial slab" , "section of church" , "High table for religious ceremonies" , "Focus of religious activity" , "Place for sacrifices" .)