Base time indicated (5)
I believe the answer is:
meant
'indicated' is the definition.
(thesaurus)
'base time' is the wordplay.
'base' becomes 'mean' (synonyms).
'time' becomes 't' (abbreviation).
'mean'+'t'='MEANT'
(Other definitions for meant that I've seen before include "Denoted" , "Implied" , "represented" , "Aimed" , "designed" .)