Furnishes quality shop with lines finally lacking (8)
I believe the answer is:
delivers
'furnishes' is the definition.
'quality shop with lines finally lacking' is the wordplay.
'quality shop' becomes 'deli' (deli is a kind of shop. I am not sure about the 'quality' bit.).
'with' is a charade indicator (letters next to each other).
'lines' becomes 'verse' (I've seen this before).
'finally lacking' means to remove the last letter.
'verse' with its last letter taken off is 'vers'.
'deli'+'vers'='DELIVERS'
Can you help me to learn more?
(Other definitions for delivers that I've seen before include "Hands over or rescues" , "Brings something to a destination" , "Gives, a speech say" .)