Lift first of immaculate white shrouds (5)
I believe the answer is:
hoick
'lift' is the definition.
(thesaurus)
'first of immaculate white shrouds' is the wordplay.
'first of' suggests taking the first letters.
'white' becomes 'hock' (type of white wine).
'shrouds' indicates putting letters inside (shrouds can mean covers or contains).
The first letter of 'immaculate' is 'i'.
'i' placed into 'hock' is 'HOICK'.
(Other definitions for hoick that I've seen before include "Raise suddenly" , "Lift sharply" , "Rise up" , "jerk" , "Lift abruptly" .)