Help old boy with computer that's backfired in the country (8)
I believe the answer is:
cambodia
'country' is the definition.
(Cambodia is an example)
'help old boy with computer that's backfired' is the wordplay.
'help' becomes 'aid' (synonyms).
'old boy' becomes 'ob' (abbreviation).
'with' is a charade indicator (letters next to each other).
'computer' becomes 'mac' (I've seen this in other clues).
'that's backfired' says the letters should be written in reverse.
'aid'+'ob'+'mac'='aidobmac'
'aidobmac' written backwards gives 'CAMBODIA'.
'in the' is the link.
(Other definitions for cambodia that I've seen before include "somewhere in Asia" , "A nation in southeastern Asia" , "SE Asian nation" , "Kampuchea before 1975" , "This was formerly Kampuchea" .)