Possible Clues:

• (Old) type of message
• Let up, for example, on sheepish type in old communiqu¿
• Wire going round old border permitted
• Even wired correctly, it could still shock
• Electronic message
• Message Mrs Simpson permitted to be put up
• Communication, say, between left and right side covers
• Wire for a leg of mutton at last
• Message for vehicle going round Eastern part of course
• Lofgren hailed as 'the guitar player's guitar player'