What's put by toilet door, heading off into lounge (3,4)
I believe the answer is:
loo roll
'what's put by toilet' is the definition.
(I know this)
'door heading off into lounge' is the wordplay.
'heading off' means to remove the first letter.
'into' indicates putting letters inside.
'lounge' becomes 'loll' (both can mean to sit in a relaxed way).
'door' with its initial letter removed is 'oor'.
'oor' placed into 'loll' is 'LOO ROLL'.
(Other definitions for loo roll that I've seen before include "Paper for ladies" , "sheets required by Pan" , "cleaning sheets" , "paper from another room?" , "Bumph" .)