It changes later, yes, towards the sunrise (8)
I believe the answer is:
easterly
'sunrise' is the definition.
The answer and definition can be both types of natural phenomena as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'it changes later yes towards' is the wordplay.
'later yes' can be anagrammed to 'EASTERLY'.
Though, I'm not sure how the anagram is indicated.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for easterly that I've seen before include "Year's let (anag) - direction of 15" , "Of wind, blowing from direction of rising sun" , "large blow" , "bitter blow for the UK" , "Wind to westward" .)