Sheep sometimes gathering where horses run? (5)
I believe the answer is:
epsom
'horses run?' is the definition.
The definition suggests a singular noun which matches the answer.
'sheep sometimes gathering' is the wordplay.
'gathering' indicates the answer is hidden within the clue (parts of the clue hold or gather the answer).
'EPSOM' is hidden within 'sheep sometimes'.
'where' acts as a link.
Can you help me to learn more?
(Other definitions for epsom that I've seen before include "English racecourse" , "Derby and Oaks racecourse" , "Derby racecourse - salts" , "Home to the Derby and the Oaks" , "Racetrack" .)