Remain in appealing ermine (6)
I believe the answer is:
linger
'remain' is the definition.
(lingering is a kind of remaining)
'in appealing ermine' is the wordplay.
'in' indicates the answer is hidden within the clue.
'LINGER' can be found hidden inside 'appealing ermine'.
(Other definitions for linger that I've seen before include "Stay on as if reluctant to leave" , "'Loiter, delay leaving (6)'" , "Be slow to leave" , "Remain behind" , "Hang back awhile" .)