Some of the Bay City Rollers in part of Austria (5)
I believe the answer is:
tyrol
'part of austria' is the definition.
('Tyrol' is part of 'austria')
'some of the bay city rollers' is the wordplay.
'some of' indicates the answer is hidden within the clue.
'TYROL' can be found hidden inside 'bay city rollers'.
'in' is the link.
(Other definitions for tyrol that I've seen before include "mountain state" , "Gustav ---, symphonist" , "Alpine region of Austria and Italy" , "mountainous area" , "Austrian/Italian region" .)