Man abroad resigned over second software bug (8)
I believe the answer is:
mosquito
'bug' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'man abroad resigned over second software' is the wordplay.
'man abroad' becomes 'mos' (I can't justify this - if you can you should give a lot more credence to this answer).
'resigned' becomes 'quit' (I've seen this in another clue).
'over' says to put letters next to each other (in a down clue, some letters go over others).
'second software' becomes 'o' (ond letter of 'software').
'mos'+'quit'+'o'='MOSQUITO'
Can you help me to learn more?
(Other definitions for mosquito that I've seen before include "Annoying insect" , "Malaria-carrying insect" , "Sucker" , "possible disease carrier" , "Malaria carrier" .)