Rugby player Don played in teachers' team maybe (5-3)
I believe the answer is:
stand-off
'rugby player' is the definition.
(I've seen this before)
'don played in teachers' team maybe' is the wordplay.
'played' indicates an anagram.
'in' means one lot of letters goes inside another.
'teachers' team maybe' becomes 'staff' (teaching staff).
'don' is an anagram of 'ndo'.
'ndo' put within 'staff' is 'STAND-OFF'.
(Other definitions for stand-off that I've seen before include "Impasse" , "Deadlock - keep away (8;5-3)" , "Deadlock between two matched opponents" , "Deadlock between equal opponents" , "Remain at a distance - while on feet?" .)