Sister about to confuse worker in leather (7)
I believe the answer is:
saddler
'worker in leather' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'sister about to confuse' is the wordplay.
'sister' becomes 'sr' (abbreviation as in names of nuns).
'about' is an insertion indicator.
'to confuse' becomes 'addle' (addling is a kind of confusing).
'sr' enclosing 'addle' is 'SADDLER'.
Can you help me to learn more?
(Other definitions for saddler that I've seen before include "he'll offer you a seat" , "One makes leather goods for horses" , "Maker of seats for riders" , "I'll make seat" , "Leather-worker" .)