Win about half a game as a rugby team! (5)
I believe the answer is:
wigan
'a rugby team' is the definition.
The definition suggests a singular noun which matches the answer.
'win about half a game' is the wordplay.
'about' means one lot of letters goes inside another.
'half a' means to take half the letters.
'game' with half the letters taken is 'ga'.
'win' enclosing 'ga' is 'WIGAN'.
'as' is the link.
Can you help me to learn more?
(Other definitions for wigan that I've seen before include "Town near Manchester" , "Greater Manchester town with an "Athletic" football club" , "The Road to -- Pier (Orwell)" , "Lancashire town" , "North-western town" .)