Racehorse that finishes up after all the others (6)
I believe the answer is:
plater
'racehorse that finishes up' is the definition.
The definition suggests a singular noun which matches the answer.
'after all the others' is the wordplay.
I cannot really understand how this works, but
'after' could be 'later' (I've seen this before) and 'later' is located in the answer.
A single letter 'p' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for plater that I've seen before include "Worker who coats articles with a film of metal" , "cook?" , "Alan, playwright" , "horse entered in minor race" .)