Rubbish outing ending in Crewe (5)
I believe the answer is:
tripe
'rubbish' is the definition.
(I know that rubbish can be written as tripe)
'outing ending in crewe' is the wordplay.
'outing' becomes 'trip' (I've seen this before).
'ending in' suggests the final letters.
The final letter of 'crewe' is 'e'.
'trip'+'e'='TRIPE'
(Other definitions for tripe that I've seen before include "Balderdash" , "poor stuff" , "Pants" , "Edible nonsense?" , "Rhubarb" .)