Drain runs behind repeatedly empty Scunthorpe warehouse (5)
I believe the answer is:
sewer
'drain' is the definition.
(I know that sewer is a type of drain)
'runs behind repeatedly empty scunthorpe warehouse' is the wordplay.
'behind repeatedly' can mean two replacements for 'behind'.
'runs' becomes 'r' (cricket abbreviation).
'behind' means one lot of letters go next to another.
'behind' says to put letters next to each other.
'empty' means to remove the middle letters.
'warehouse' becomes 'we' (I can't explain this - if you can you should believe this answer much more).
'scunthorpe' with its centre removed is 'se'.
'se' next to 'we' is 'sewe'.
'r' after 'sewe' is 'SEWER'.
Can you help me to learn more?
(Other definitions for sewer that I've seen before include "One stitching - discharge channel" , "Tailor" , "Drainage channel" , "Embroiderer; soil pipe" , "Filthy channel" .)