Having free time, idles casually round Yorkshire river (8)
I believe the answer is:
leisured
'having free time' is the definition.
I can't judge whether this defines the answer.
'idles casually round yorkshire river' is the wordplay.
'casually' indicates an anagram (a casual or disordered version of the letters).
'round' means one lot of letters goes inside another.
'yorkshire river' becomes 'ure' (River Ure).
'idles' with letters rearranged gives 'leisd'.
'leisd' placed around 'ure' is 'LEISURED'.
Can you help me to learn more?
(Other definitions for leisured that I've seen before include "Having plenty of free time" , "Having much free time" , "unhurried" , "Not needing to work" .)