Related Clues:

• First sign?
• First to show approval thus
• Sign changes, first letter going off
• Heavenly butter, this
• Sign one letter
• Ram airliners regularly
• Hosts expelling a thousand stars
• Sign: 'Jump's off limits'
• Introductory letter
• Sign of tooth decay, canine's first to be extracted
• Byatt's first is a first
• Opening one No Trumps, I almost entirely enthral Institute
• First to subscribe, writing letters
• Group of stars is/are explosive
• Original language I brought back I included