Public transport turning up prepared for part of a group (6)
I believe the answer is:
subset
'part of a group' is the definition.
The answer and definition can be both groups as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'public transport turning up prepared' is the wordplay.
'public transport' becomes 'bus' (bus is a kind of public transport).
'turning up' shows that the letters should be reversed in order.
'prepared' becomes 'set' (set up or ready).
'bus' backwards is 'sub'.
'sub'+'set'='SUBSET'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for subset that I've seen before include "A collection of things forming part of a larger collection" , "small class?" , "Group within a group" , "Small group nested inside larger group" , "Not all the members" .)