A charge that makes you feel robbed of pounds (3)
I believe the answer is:
fee
'a charge' is the definition.
(fee is a kind of charge)
'feel robbed of pounds?' is the wordplay.
'robbed of' is a deletion indicator.
'pounds?' becomes 'l' (L can represent the monetary pound).
'feel' with 'l' removed is 'FEE'.
'that makes you' is the link.
(Other definitions for fee that I've seen before include "Payment to a professional for services" , "Sum payable to professional person for services" , "(Entry) charge" , "Cost" , "Sum payable to, say, barrister" .)