Floor-covering found in Berlin once (4)
I believe the answer is:
lino
'floor-covering' is the definition.
I can't judge whether this defines the answer.
'in berlin once' is the wordplay.
'in' indicates the answer is hidden within the clue.
'LINO' is hidden within 'berlin once'.
'found' is the link.
Can you help me to learn more?
(Other definitions for lino that I've seen before include "Floor covering (abbr)" , "Tough floor covering" , "put this down?" , "'Floor covering, in short (4)'" .)