Interruption popular in tours? Wrong (9)
I believe the answer is:
intrusion
'interruption' is the definition.
(thesaurus)
'popular in tours? wrong' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'wrong' indicates an anagram.
'in'+'tours'='intours'
'intours' is an anagram of 'trusion'.
'in'+'trusion'='INTRUSION'
(Other definitions for intrusion that I've seen before include "Uninvited presence" , "Encroachment" , "Something entering undesirably" .)