Desperate U-turn over Europe, ultimately deceptive (6)
I believe the answer is:
untrue
'deceptive' is the definition.
(thesaurus)
'desperate u-turn over europe ultimately' is the wordplay.
'desperate' is an anagram indicator (I've seen this in other clues).
'over' says to put letters next to each other.
'ultimately' indicates one should take the final letters.
The last letter of 'europe' is 'e'.
'u'+'turn'='uturn'
'uturn' is an anagram of 'untru'.
'untru'+'e'='UNTRUE'
(Other definitions for untrue that I've seen before include "False or crooked" , "Not in accordance with fact" , "Spurious" , "Not faithful" , "Not level" .)