Train tours are organised (8)
I believe the answer is:
eurostar
'train' is the definition.
(I've seen this before)
'tours are organised' is the wordplay.
'organised' indicates an anagram.
'tours'+'are'='toursare'
'toursare' is an anagram of 'EUROSTAR'.
(Other definitions for eurostar that I've seen before include "cross-Channel express" , "Channel link" , "The train from England to France" , "International train" , "Channel tunnel rail service" .)