Fancy furs on new designer clothes move from side to side (7-4)
I believe the answer is:
channel-surf
'move from side to side' is the definition.
Although both the answer and definition are verbs in their base form, I cannot see how one could define the other.
'fancy furs on new designer clothes' is the wordplay.
'fancy' is an anagram indicator.
'on' indicates putting letters inside (as in clothing 'on' a person).
'new designer clothes' becomes 'channel' (I can't justify this - if you can you should believe this answer much more).
'furs' anagrammed gives 'surf'.
'surf' enclosing 'channel' is 'CHANNEL-SURF'.
Can you help me to learn more?
(Another definition for channel-surf that I've seen is " Flit between TV stations in search of interest".)