Related Clues:

• Up on trends
• When doubled, start of a cheer
• Bearing in mind
• On top of it
• Mindful of
• 'I'm ___'
• Tuned-in
• When repeated, start of a cheer
• Sound repeated while marching
• Not oblivious
• Attentive
• Like jazz cats
• Took notice
• Mindful (of)
• Like jazz musicians