Possible Clues:

• Mature returns collected by curious bunch
• Many years among that upstanding, fragrant bunch
• Spooner's horse does this for a bunch of flowers
• Organ bright with flowers
• Small scented bouquet — eg say no (anag)
• Small posy
• Lack of influence about, say, bunch of flowers
• Bunch of scented flowers
• Posy says no, according to Spooner
• Posy of flowers