Now touring Channel Islands, knowing about things in advance (9)
I believe the answer is:
prescient
'knowing about things in advance' is the definition.
'now touring channel islands' is the wordplay.
'now' becomes 'present' (I've seen this before).
'touring' indicates putting letters inside (touring can mean going round).
'channel islands' becomes 'ci'.
'present' going around 'ci' is 'PRESCIENT'.
(Other definitions for prescient that I've seen before include "Knowing of future events" , "Knowing in advance" , "Foreknowing" , "Having second sight" , "like people looking to the future" .)