False trusty person upset dupe (7-2)
I believe the answer is:
trumped up
'false' is the definition.
(synonyms)
'trusty person upset dupe' is the wordplay.
I cannot quite understand how this works, but
'person' could be 'mp' (MP is an example) and 'mp' is located in the answer.
an anagram of 'dupe' is 'edup' which is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for trumped up that I've seen before include "not properly designed" , "Played winning card" , "Invented as an excuse or a false accusation" , "Fake" , "Falsely charged" .)