"Yosemite Valley Winter" photographer (5)
I believe the answer is:
adams
'yosemite valley winter photographer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for adams that I've seen before include "American composer" , "Second and sixth US president" , "Richard --, Watership Down author" , "Douglas - (The Hitchhiker's Guide to the Galaxy)" , "Presidential father or son" .)