Explosive Irish fellow expecting to succeed? (4)
I believe the answer is:
heir
'to succeed?' is the definition.
(thesaurus)
'explosive irish' is the wordplay.
'explosive' becomes 'he' (abbreviation for high explosive).
'irish' becomes 'IR' (abbreviation for Irish).
'he'+'ir'='HEIR'
'fellow expecting' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for heir that I've seen before include "One expected to succeed?" , "Successor, next in line" , "One destined to succeed" , "One set to inherit" , "Treasured family possession" .)