Huge electoral victory for country's Liberal and Democrat leaders (9)
I believe the answer is:
landslide
'huge electoral victory' is the definition.
'landslide' can be an answer for 'victory' (I've seen this before). I'm not certain of the 'huge electoral' bit.
'country's liberal and democrat leaders' is the wordplay.
'country's' becomes 'land's' ('land' can be a synonym of 'country').
'liberal' becomes 'l' (abbreviation).
'and' says to put letters next to each other.
'democrat leaders' becomes 'ide' (I can't justify this - if you can you should give a lot more credence to this answer).
'lands'+'l'+'ide'='LANDSLIDE'
'for' is the link.
Can you help me to learn more?
(Other definitions for landslide that I've seen before include "Overwhelming electoral victory" , "Movement at grass-roots level" , "Runaway" , "Large earth movement" , "Shifting of ground" .)