Think temperature’s dropped, so intervene (7)
I believe the answer is:
mediate
'intervene' is the definition.
(thesaurus)
'think temperature's dropped' is the wordplay.
'think' becomes 'meditate' (I've seen this before).
'temperature' becomes 't' (abbreviation).
'dropped' indicates named letters should be taken away.
'meditate' with 't' taken away is 'MEDIATE'.
'so' is the link.
(Other definitions for mediate that I've seen before include "Act as negotiator or peacemaker" , "Help resolve a dispute" , "try to resolve dispute" , "Act as conciliator" , "Act as negotiator between opposing side" .)