Where jockeys may be seen composing poems (5)
I believe the answer is:
epsom
'where jockeys may be' is the definition.
The definition suggests a singular noun which matches the answer.
'composing poems' is the wordplay.
'composing' indicates anagramming the letters.
'poems' is an anagram of 'EPSOM'.
'seen' is the link.
Can you help me to learn more?
(Other definitions for epsom that I've seen before include "track in Surrey" , "Classic venue" , "& 5 Purgative medicine" , "Downs" , "Mopes around English Derby venue" .)