Old CID man surprisingly inclined to wander (7)
I believe the answer is:
nomadic
'inclined to wander' is the definition.
(I've seen this in another clue)
'old cid man surprisingly' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'surprisingly' indicates an anagram (a surprising ordering of the letters).
'o'+'cid'+'man'='ocidman'
'ocidman' is an anagram of 'NOMADIC'.
(Other definitions for nomadic that I've seen before include "vagrant" , "Perhaps unsettling" , "Lacking fixed home" , "Migratory" , "Roaming" .)