Recalled difficulty about the old person in market (5)
I believe the answer is:
buyer
'person in market' is the definition.
'buyer' can be an answer for 'person' (buyer is a kind of person). I'm unsure of the 'in market' bit.
'recalled difficulty about the old' is the wordplay.
'recalled' says the letters should be written backwards (to recall can mean to bring something back).
'difficulty' becomes 'rub' (rub can mean a difficulty or problem).
'about' means one lot of letters goes inside another.
'the old' becomes 'ye' (resembles a historical spelling of 'the').
'rub' reversed gives 'bur'.
'bur' placed around 'ye' is 'BUYER'.
Can you help me to learn more?
(Other definitions for buyer that I've seen before include "customer" , "One making purchase" , "Shop employee" , "One forking out money" , "A purchaser, maybe for firm" .)