Spaniard possibly to pass on turn (5)
I believe the answer is:
diego
'spaniard' is the definition.
(I've seen this before)
'to pass on turn' is the wordplay.
'to pass on' becomes 'die' (I've seen this before).
'turn' becomes 'go' (a person's move in a board game).
'die'+'go'='DIEGO'
'possibly' is the link.
(Other definitions for diego that I've seen before include "Spanish name" , "San --, -- Garcia" , "Maradona, say" , "Spaniard potentially" , "Possibly Maradona" .)