New tie takes turn in case (4)
I believe the answer is:
etui
'in case' is the definition.
(I've seen this before)
'new tie takes turn' is the wordplay.
'new' indicates anagramming the letters.
'takes' is an insertion indicator.
'turn' becomes 'u' (a 'U-turn' is a kind of turn).
'tie' anagrammed gives 'eti'.
'eti' enclosing 'u' is 'ETUI'.
(Other definitions for etui that I've seen before include "Ornamental ladies' bag for small articles" , "Small case for needles, cosmetics, etc" , "Case containing sharp objects" , "Tiny ladies' bag" , "Ornamental bag for needles etc." .)