Rubbish holiday ending in Scunthorpe (5)
I believe the answer is:
tripe
'rubbish' is the definition.
(both can mean nonsense)
'holiday ending in scunthorpe' is the wordplay.
'holiday' becomes 'trip' (I've seen this in another clue).
'ending in' suggests the final letters.
The last letter of 'scunthorpe' is 'e'.
'trip'+'e'='TRIPE'
(Other definitions for tripe that I've seen before include "Bunk" , "Ruminant's stomach lining" , "Pants" , "Edible lining of cow's stomach - rubbish" , "Something to eat" .)