Son, upper-class type, and bishop needing no work to become snooty (8)
I believe the answer is:
snobbish
'snooty' is the definition.
(thesaurus)
'son upper-class type and bishop needing no' is the wordplay.
'son' becomes 's'.
'upper class type' becomes 'bish' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' says to put letters next to each other (I've seen this in other clues).
'bishop' becomes 'b' (abbreviation used in chess).
'needing' is a charade indicator (letters next to each other).
'bish' put after 'b' is 'bbish'.
'bbish' after 'no' is 'nobbish'.
's'+'nobbish'='SNOBBISH'
'work to become' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for snobbish that I've seen before include "stuck up" , "Toffee-nosed" , "Posh" , "Condescending to inferiors" , "Stuck-up" .)