He's unlikely to be found abroad (4-2-4)
I believe the answer is:
stay-at-home
'he's unlikely to be found abroad' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'he's unlikely to be' is the wordplay.
'he's unlikely' becomes 'athome' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'be' becomes 'stay' (staying is a kind of being).
'athome' put after 'stay' is 'STAY-AT-HOME'.
Can you help me to learn more?
(Other definitions for stay-at-home that I've seen before include "Unadventurous in travel" , "Don't go out" , "Person disinclined to travel" , "One not given to travel" .)