Tourism ruined by English rain? (8)
I believe the answer is:
moisture
'rain?' is the definition.
(thesaurus)
'tourism ruined by english' is the wordplay.
'ruined' is an anagram indicator.
'by' means one lot of letters go next to another.
'english' becomes 'e' (abbreviation**).
'tourism' is an anagram of 'moistur'.
'moistur'+'e'='MOISTURE'
(Other definitions for moisture that I've seen before include "Damp" , "Liquid in vapour or spray form" , "Small amount of liquid causing dampness" , "Liquid in small quantity, in the air say" , "Wetness caused by water" .)