Stable worker, guy after special uniform (9)
I believe the answer is:
liveryman
'stable worker' is the definition.
'liveryman' can be an answer for 'worker' (liveryman is a kind of worker). I'm not sure about the 'stable' bit.
'guy after special uniform' is the wordplay.
'guy' becomes 'man' (guy can informally mean a man).
'after' says to put letters next to each other.
'special uniform' becomes 'livery' (livery is a type of formal uniform. I am not sure about the 'special' bit.).
'man' after 'livery' is 'LIVERYMAN'.
Can you help me to learn more?
(Other definitions for liveryman that I've seen before include "Member of a City Company" , "Member of guild" , "One looking after hacks" , "Uniformed servant" .)