Parcel looks somewhat ... It needs a bow! (5)
I believe the answer is:
cello
'it needs a bow' is the definition.
'parcel looks somewhat' is the wordplay.
'somewhat' indicates a hidden word.
'CELLO' is hidden in the letters of 'parcel looks'.
(Other definitions for cello that I've seen before include "It's bigger than a viola, but smaller than a double bass" , "Orchestral instrument played between the legs" , "Instrument in the violin family" , "Tortelier's instrument" , "music produced by this?" .)