Transport for those who are late (7)
I believe the answer is:
hearses
'those who are late' is the definition.
The definition suggests an adverb but the answer is not.
'transport for' is the wordplay.
'transport' becomes 'hearse' (hearse is a kind of transport).
'for' becomes 's' (I can't explain this - if you can you should believe this answer much more).
'hearse'+'s'='HEARSES'
Can you help me to learn more?
(Other definitions for hearses that I've seen before include "Vehicles for carrying coffins" , "Cars for corpses" , "The last carriers" .)