Turn wanderer off jockeys, say (9)
I believe the answer is:
underwear
'jockeys say' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'turn wanderer off' is the wordplay.
'turn' becomes 'U' (a 'U-turn' is a kind of turn).
'off' indicates anagramming the letters.
'wanderer' with letters rearranged gives 'nderwear'.
'u'+'nderwear'='UNDERWEAR'
Can you help me to learn more?
(Other definitions for underwear that I've seen before include "Vests, knickers etc" , "Garments worn beneath other clothes" , "shift, perhaps" , "Bloomers" , "slips, perhaps" .)