Fear Italy's deployment - that's not true (5,4)
I believe the answer is:
fairy tale
'not true' is the definition.
The definition suggests a singular noun which matches the answer.
'fear italy's deployment' is the wordplay.
'deployment' is an anagram indicator (letters deployed in a new way).
'fear'+'italy'='fearitaly'
'fearitaly' is an anagram of 'FAIRY TALE'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for fairy tale that I've seen before include "Children's magic tale or incredible story for adult" , "'Once upon a time...'" , "Children's story with magical beings" , "''... of New York'' (The Pogues)" , "A magical story for children" .)