Delightful, cleaner joining dynasty (8)
I believe the answer is:
charming
'delightful' is the definition.
(I've seen this before)
'cleaner joining dynasty' is the wordplay.
'cleaner' becomes 'char' (charwoman is a type of cleaner).
'joining' means one lot of letters go next to another.
'dynasty' becomes 'ming' (I've seen this before).
'char'+'ming'='CHARMING'
(Other definitions for charming that I've seen before include "Delightful, attractive" , "Lovely! - with 15a" , "Beguiling, enchanting" .)