Provisional termini built (7)
I believe the answer is:
interim
'provisional' is the definition.
(I've seen this before)
'termini built' is the wordplay.
'built' indicates an anagram.
'termini' anagrammed gives 'INTERIM'.
(Other definitions for interim that I've seen before include "not there for ever" , "Meantime - provisional" , ", I'm put in grave situation initially" , "Meantime; temporary" , "Caretaker" .)