Liberal Democrat genius showing dejection (14)
I believe the answer is:
discouragement
'dejection' is the definition.
(I've seen this before)
'liberal democrat genius' is the wordplay.
'liberal' indicates an anagram.
'democrat'+'genius'='democratgenius'
'democratgenius' anagrammed gives 'DISCOURAGEMENT'.
'showing' is the link.
(Other definitions for discouragement that I've seen before include "Dejection" , "causing despondency" , "A deterrent" , "Process of making someone lose confidence" , "Persuasion (against an action)" .)