You're welcome whenever you like! (7)
I believe the answer is:
anytime
'whenever you like' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for anytime that I've seen before include "Whenever, as it doesn't matter" , "At whatever moment" , "At no particular moment" , "A tiny me (anag.)" , "date not fixed" .)