One holding books in shops at Chelsea (7)
I believe the answer is:
satchel
'one holding books' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'in shops at chelsea' is the wordplay.
'in' indicates a hidden word.
'SATCHEL' is hidden in the letters of 'shops at chelsea'.
Can you help me to learn more?
(Other definitions for satchel that I've seen before include "Get school item" , "Bag with a strap for books" , "Text mark for an insertion" , "Bag with a flap and strap" , "Bag -- latches (anag)" .)