Roger excited about brilliant visitor to Newmarket? (8)
I believe the answer is:
racegoer
'visitor to newmarket?' is the definition.
I can't tell whether this defines the answer.
'roger excited about brilliant' is the wordplay.
'excited' indicates anagramming the letters.
'about' is an insertion indicator.
'brilliant' becomes 'ace' (I've seen this before).
'roger' with letters rearranged gives 'rgoer'.
'rgoer' going around 'ace' is 'RACEGOER'.
Can you help me to learn more?
(Other definitions for racegoer that I've seen before include "Eg, one attending Derby" , "Frequenter of 51 [ASCOT]" , "One on course" , "for speculative investments?" , "On track, perhaps better" .)