One chosen explosive broke up explosive one (7)
I believe the answer is:
nominee
'one chosen' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'explosive broke up explosive one' is the wordplay.
I cannot quite see how this works, but
'explosive' could be 'mine' (e.g. a landmine) and 'mine' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for nominee that I've seen before include "Person standing for office" , "figure entering field?" , "somebody put up" , "Person put forward" , "One named to act for another" .)