Winter coming is too much for contact system (8)
I believe the answer is:
intercom
'contact system' is the definition.
'intercom' can be an answer for 'system' (intercom is a kind of system). I'm not certain of the 'contact' bit.
'winter coming is too much' is the wordplay.
'is too much' indicates the answer is hidden within the clue (only some letters needed - the rest are 'too much').
'INTERCOM' can be found hidden inside 'winter coming'.
'for' is the link.
Can you help me to learn more?
(Other definitions for intercom that I've seen before include "Communications device" , "messaging system" , "Receiver" , "System of communication by radio or telephone" , "Two-way communicator" .)