Answer:

upbeat

Answer	Crossword Clue
UPBEAT	Optimistic
UPBEAT	Cheerful
UPBEAT	Cheery

UPBEAT	Sunny
UPBEAT	In a good mood
UPBEAT	In high spirits
UPBEAT	Happy
UPBEAT	Musical measure.
UPBEAT	End of a measure in music.
UPBEAT	Musical accent.
UPBEAT	Rosy; cheerful

UPBEAT	Musical term for cheerful remix of EP with tuba (6)
UPBEAT	Positive
UPBEAT	Like a happy pop song
UPBEAT	Certainly cheery
UPBEAT	Lively and happy
UPBEAT	Sanguine
UPBEAT	Bullish
UPBEAT	Buoyant