Swimmer in good old school group? (8)
I believe the answer is:
goldfish
'swimmer' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'good old school group?' is the wordplay.
'good' becomes 'g' (abbreviation).
'school group?' becomes 'fish' (I've seen this in another clue).
'g'+'old'+'fish'='GOLDFISH'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for goldfish that I've seen before include "Pond or aquarium fish" , "one enjoying pond life?" , "Bowl or pond dweller" , "he may go round in a tank" , "Place lacking privacy" .)