Players on tour one left stranded? (8)
I believe the answer is:
'one left stranded?' is the definition.
(eg someone stranded on an island)
'players on tour' is the wordplay.
'players' becomes 'cast' (group of actors).
'on tour' becomes 'away' (eg away on holiday).
(Other definitions for castaway that I've seen before include "Shipwrecked or abandoned person like Robinson Crusoe" , "Eg, Robinson Crusoe" , "one flung out" , "Someone stranded on a 12 island" , "Tom Hanks movie" .)