Controlled temperature in tirade (4)
I believe the answer is:
rant
'tirade' is the definition.
(I've seen this before)
'controlled temperature' is the wordplay.
'controlled' becomes 'ran' (I've seen this in other clues).
'temperature' becomes 't' (abbreviation).
'ran'+'t'='RANT'
'in' acts as a link.
(Other definitions for rant that I've seen before include "Speak wildly and incoherently" , "Speak intemperately" , "Angry tirade" , "Intemperate speech" , "Angry outburst" .)