Possible Clues:

• Heart artery operation
• Go round using permit
• Type of coronary procedure
• Coronary artery surgery
• A yard from park in low pitch does one's heart good
• Times approve such an operation
• Sort of surgery not found in town centre?
• Ignore boy heartlessly with free ticket
• Major operation as Times each year put on finals of puzzles championships
• The way round an obstruction, or a town