Some parcel looped with string? (5)
I believe the answer is:
cello
'string?' is the definition.
(I know that cello is a type of string)
'some parcel looped with' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'CELLO' is hidden in the letters of 'parcel looped with'.
(Other definitions for cello that I've seen before include "Jacqueline du Pre's instrument" , "It's bigger than a viola, but smaller than a double bass" , "Bass stringed instrument" , "Tortelier's instrument" , "Casals' instrument" .)