Possibly save about £1 for a bag (6)
I believe the answer is:
valise
'a bag' is the definition.
(valise is a kind of bag)
'possibly save about aps1' is the wordplay.
'possibly' indicates anagramming the letters.
'about' indicates putting letters inside.
'apsl' becomes 'li' (I am not sure about this - if you are sure you should believe this answer much more).
'save' anagrammed gives 'vase'.
'vase' enclosing 'li' is 'VALISE'.
'for' is the link.
Can you help me to learn more?
(Other definitions for valise that I've seen before include "Elvis A? (anag)" , "Overnight case" , "Small overnight bag" , "Small piece of luggage" , "Travel bag" .)