Ruffles feathers in Scottish team, dismissing leader (6)
I believe the answer is:
angers
'ruffles feathers' is the definition.
(I've seen this in another clue)
'scottish team dismissing leader' is the wordplay.
'scottish team' becomes 'Rangers' (Rangers FC are a Scottish football club).
'dismissing leader' means to remove the first letter.
'rangers' with its initial letter taken off is 'ANGERS'.
'in' acts as a link.
(Other definitions for angers that I've seen before include "Infuriates" , "Irritates" , "Maine city" , "Maddens" , "annoys" .)