One may be running starkers, briefly, around middle of field (8)
I believe the answer is:
streaker
'one may' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'running starkers briefly around middle of field' is the wordplay.
'running' indicates anagramming the letters (the letters run around to different places).
'briefly' means to remove the last letter.
'around' means one lot of letters goes inside another.
'middle of' indicates the central letters.
The middle letter of 'field' is 'e'.
'starkers' with its last letter taken off is 'starker'.
'starker' is an anagram of 'streakr'.
'streakr' going around 'e' is 'STREAKER'.
'be' is the link.
Can you help me to learn more?
(Other definitions for streaker that I've seen before include "he barely covers the distance" , "Someone running naked in a public place" , "Rat reeks (anag.)" , "One who runs naughtily nude in public" , "One making a dash without clothes" .)