Fetching piano that needs taking back (13)
I believe the answer is:
prepossessing
'fetching' is the definition.
(I've seen this before)
'piano that needs taking back' is the wordplay.
'piano' becomes 'p'.
'that needs' means one lot of letters go next to another.
'taking back' becomes 'repossessing' ('repossess' can be a synonym of 'take back').
'p'+'repossessing'='PREPOSSESSING'
(Other definitions for prepossessing that I've seen before include "winning" , "Fetching" , "Attractive" , "looking good" .)