Treacherous individual very content to follow important guest (5)
I believe the answer is:
viper
'treacherous individual' is the definition.
(viper can figuratively mean a treacherous person)
'very content to follow important guest' is the wordplay.
'content' indicates the central letters.
'to follow' says to put letters next to each other (some letters go after or follow others).
'important guest' becomes 'vip' (I can't justify this - if you can you should give a lot more credence to this answer).
The middle letters of 'very' are 'er'.
'er' after 'vip' is 'VIPER'.
Can you help me to learn more?
(Other definitions for viper that I've seen before include "Adder" , "A poisonous snake or treacherous person" , "spiteful person" , "Malicious type" , "Venomous snake, person" .)