Possible Clues:

• Where to put a pin on a jacket
• It's sometimes grabbed
• Nehru jacket's lack
• For the turnover it's fifty-fifty about the primate
• Sort of monkey in fifty-fifty for a turnover
• One may be buttonholed to take in flowers
• Turn the French friend over the overcoat
• in a couple of quid it's less than human to make such a turnover
• It may be buttonholed
• Lower part of collar on coat