Possible Clues:

• 'By the sound of it, missed 'er on the turn, as usual (4)'
• General average
• 'Cheers' customer
• Cliff's pal on "Cheers"
• Choice of letters is standard
• No room for a standard
• "Cheers" habitue
• 'Cheers' shout
• That's neither unusual nor grand
• There's no room that's standard