Natural to tour county, rambling (10)
I believe the answer is:
incoherent
'rambling' is the definition.
(similar in meaning)
'natural to tour county' is the wordplay.
'natural' becomes 'inherent' (I've seen this before).
'to tour' means one lot of letters goes inside another (to tour can mean to go around).
'county' becomes 'co'.
'inherent' placed around 'co' is 'INCOHERENT'.
(Other definitions for incoherent that I've seen before include "difficult to understand" , "Internally inconsistent" , "Confused" , "drunk?" , "Unintelligible" .)