Stable men let Ross get upset (7)
I believe the answer is:
ostlers
'stable men' is the definition.
The answer and definition can be both people as well as being plural nouns.
Perhaps you can see a link between them that I can't see?
'let ross get upset' is the wordplay.
'get upset' is an anagram indicator (I've seen 'getting upset' mean this).
'let'+'ross'='letross'
'letross' with letters rearranged gives 'OSTLERS'.
Can you help me to learn more?
(Other definitions for ostlers that I've seen before include "Let Ross join in group of old stable managers" , "They used to stable horses at inns" , "They looked after the horses at the inns of old" , "Historically they looked after the horses at an inn" , "Stablemen at inns of old" .)