I brought in £2, readily offering cash (6)
I believe the answer is:
liquid
'cash' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for liquid that I've seen before include "Neither sold nor gaseous" , "It flows freely" , "Flowing" , "Spendable" , "Such an easy source of funds" .)