Admitting hot finally, scarf put away (5)
I believe the answer is:
stash
'put away' is the definition.
(thesaurus)
'admitting hot finally scarf' is the wordplay.
'admitting' is an insertion indicator.
'finally' suggests the final letters.
'scarf' becomes 'sash' (I've seen this before).
The last letter of 'hot' is 't'.
't' going inside 'sash' is 'STASH'.
(Other definitions for stash that I've seen before include "Stow away" , "Secret(ly) store" , "Hide in a secret place" , "Treasure trove" , "Consignment of drugs" .)