Talks back when checking explosive urge (6)
I believe the answer is:
argues
'talks back' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their -s form.
Maybe there's an association between them I don't understand?
'when checking explosive urge' is the wordplay.
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'checking' is an insertion indicator (check can mean to control or arrest).
'explosive' indicates anagramming the letters.
'urge' with letters rearranged gives 'rgue'.
'as' enclosing 'rgue' is 'ARGUES'.
Can you help me to learn more?
(Other definitions for argues that I've seen before include "Disputes, contends verbally" , "Quarrels or disagrees" , "Contends, debates" , "Disputes, proposes the contrary" , "Debates or bickers" .)