Crazy person from Northern Ireland area absorbed in computer (6)
I believe the answer is:
maniac
'crazy person' is the definition.
(I've seen this before)
'northern ireland area absorbed in computer' is the wordplay.
'northern ireland' becomes 'ni'.
'area' becomes 'a' (maths abbreviation).
'absorbed in' means one lot of letters goes inside another.
'computer' becomes 'mac' (I've seen this before).
'ni'+'a'='nia'
'nia' going inside 'mac' is 'MANIAC'.
'from' acts as a link.
(Other definitions for maniac that I've seen before include "Lunatic or person behaving wildly" , "Can aim (anag.)" , "Wild, perhaps violent, type" , "Lunatic, madman" , "Very reckless person" .)