Pyjamas and nightdress? (10)
I believe the answer is:
bedclothes
'pyjamas and nightdress?' is the definition.
I can't tell whether this defines the answer.
'pyjamas and nightdress?' is the wordplay.
'pyjamas' becomes 'bed' (I can't explain this - if you can you should give a lot more credence to this answer).
'and' says to put letters next to each other.
'nightdress?' becomes 'clothes' (nightdress is a kind of clothes).
'bed'+'clothes'='BEDCLOTHES'
Can you help me to learn more?
(Other definitions for bedclothes that I've seen before include "retirement coverage?" , "Sheets, blankets, etc." .)