Rosy hiker moves around northern county (9)
I believe the answer is:
yorkshire
'northern county' is the definition.
(I've seen this before)
'rosy hiker moves' is the wordplay.
'moves' is an anagram indicator.
'rosy'+'hiker'='rosyhiker'
'rosyhiker' is an anagram of 'YORKSHIRE'.
'around' acts as a link.
(Other definitions for yorkshire that I've seen before include "Joe Root's county" , "Northern region" , "County (with small terrier?)" , "Sort of pudding" , "moorland area?" .)