Following sting, eccentric means to pay (5,4)
I believe the answer is:
smart card
'to pay' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'following sting eccentric' is the wordplay.
'following' says to put letters next to each other.
'sting' becomes 'smart' (I've seen this before).
'eccentric' becomes 'card' (card can mean an eccentric person).
'smart' put next to 'card' is 'SMART CARD'.
'means' acts as a link.
Can you help me to learn more?
(Other definitions for smart card that I've seen before include "financial authorisation" , "used to carry out financial transactions" , "piece of plastic that stores data" , "Piece of plastic with micro-processor" , "ID with microprocessor built in" .)