Deceptive and ridiculous U-turn by European (6)
I believe the answer is:
untrue
'deceptive' is the definition.
(thesaurus)
'ridiculous u-turn by european' is the wordplay.
'ridiculous' is an anagram indicator.
'by' is a charade indicator (letters next to each other).
'european' becomes 'e' (abbreviation e.g. EU).
'u'+'turn'='uturn'
'uturn' is an anagram of 'untru'.
'untru'+'e'='UNTRUE'
'and' is the link.
(Other definitions for untrue that I've seen before include "Not in accordance with fact" , "Spurious" , "Fallacious" , "apocryphal" , "Not factual or honest" .)