Cost of 2 nice fleeces changed up to start of sale (7,3)
I believe the answer is:
licence fee
'fleeces changed up to start of sale' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'cost of 2 nice' is the wordplay.
I cannot quite understand how this works, but
'cost' could be 'fee' (fee is a kind of cost) and 'fee' is located in the answer.
an anagram of 'nice' is 'icen' which is within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for licence fee that I've seen is " sub".)