Commit adultery? Conservative's out and editor's excited (6)
I believe the answer is:
heated
'excited' is the definition.
(thesaurus)
'commit adultery? conservative's out and editor's' is the wordplay.
'commit adultery?' becomes 'cheat'.
'conservative' becomes 'c' (abbreviation commonly used in UK politics).
'out' suggests deleting specific letters.
'and' says to put letters next to each other.
'editor' becomes 'ed'.
'cheat' with 'c' taken away is 'heat'.
'heat'+'ed'='HEATED'
(Other definitions for heated that I've seen before include "Raised the temperature" , "Angry, impassioned" , "Of discussion, angry and hostile" , "This type of argument is passionate" , "Angry - passionate" .)