Indicated average temperature (5)
I believe the answer is:
meant
'indicated' is the definition.
(thesaurus)
'average temperature' is the wordplay.
'average' becomes 'mean' (type of average).
'temperature' becomes 't' (abbreviation).
'mean'+'t'='MEANT'
(Other definitions for meant that I've seen before include "represented" , "Signified" , "no accident" , "designed" , "Deliberate" .)