The Times Concise puzzle clues 2015 May 06

• Acid salt used, eg, as a fertiliser Crossword Clue
• Aid to keeping coiffure in place Crossword Clue
• Arrogantly self-assertive Crossword Clue
• Belgian city Crossword Clue
• Filler for tyres Crossword Clue
• Former Turkish sultanate Crossword Clue
• Harmful substance Crossword Clue
• Move more quickly Crossword Clue
• Oral Crossword Clue
• Reddish-brown stone used in jewellery Crossword Clue
• Resist, contend with Crossword Clue
• Sap-sucking insect Crossword Clue
• Sink; thick sauce Crossword Clue
• Stair rail support Crossword Clue