Possible Clues:

• Wow! Female in New Jersey, say, making bloomer
• Recess accommodating fine blue plant
• Bluebottle found in sauce thickener, say
• Plant used in gravy making, they say
• Sounds like grain ground till all is blooming blue
• Bloom lady-killer put back in buttonhole
• Ornamental plant
• Bloomer made by female, depressed in tight spot
• Run into trap that's found in meadow
• Shade of blue — clown or ref (anag)