The Times - Cryptic - This puzzle, used in the Preliminary A round of the 2012 Times National Crossword Championship, was solved correctly within the time limit by 37% of the competitors. - November 7, 2012

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Clues Answers
An essential for car? For Ferrari, yes please SIDELIGHT
Answer to one knocking perhaps — a key ENTER
As not empty, I'm not sure it's the minimum amount QUANTUM
Character number eleven involved in last stand — he's well padded up for a quick run BIKER
Draw these out to show turning point WATERSHED
Exercise: a modicum that bores DRILLBIT
Fault having backfired, ditches stuff GUBBINS
Fix verbal agreement? Get stuffed! JAMPACKED
Flirt I catch in embrace of that woman behind piano PHILANDER
Furtive — take your word for it? STEALTHY
Given decree nisi, almost had to move house RESIDENCE
Grass one should put back, and maybe does DEER
I haven't suggested he was formidable IVANTHETERRIBLE
In turn, put in answer "trousers"? Yes! TREWS
Jo's bottle? DEMIJOHN
Clues Answers
Joint followed by cold food that's painful in the mouth KNUCKLESANDWICH
Keep changing opinion — possible cause of schism? SEESAW
Killer question: sex appeal before love? Not quite HOWITZER
Last, in spite of everything AFTERALL
Learn to swear? Knock it on the head! CONCUSS
Like a knife dug finally into journalists EDGED
Make cards illegal, say — the ruin of the Irish BANJAX
Personal attire is reborn? UNDIES
Slight reaction as card game is incomplete PIQUE
Sounding futile, but part of a vital system VEIN
Spike resistance with returning tennis player's challenge? RACEME
Stop following popular music that's not mainstream INDIE
Treat an allergy of the vocal organ LARYNGEAL
Two characters at the rear, one intercepting bribe, very excited BUZZING
Wrongly assume school's neither opening nor closing barrier ARROGATE