Call on salt to be shifted that’s found in wine glass (7)
I believe the answer is:
crystal
'that's found in wine glass' is the definition.
(a wine glass may be made from crystal glass)
'call on salt to be shifted' is the wordplay.
'call' becomes 'cry' (as in a bird's call).
'on' indicates putting letters inside.
'to be shifted' indicates anagramming the letters.
'salt' with letters rearranged gives 'stal'.
'cry' put inside 'stal' is 'CRYSTAL'.
(Other definitions for crystal that I've seen before include "Clear mineral, eg, quartz" , "Glassware" , "Type of glass often cut decoratively" , "Highly-transparent glass" , "Clear quartz - fortune-teller's ball" .)