Drink knocked back in Colorado Springs (4)
I believe the answer is:
soda
'drink' is the definition.
(soda is a kind of drink)
'knocked back in colorado springs' is the wordplay.
'knocked back' says the letters should be written in reverse.
'in' indicates the answer is hidden within the clue.
'ados' is hidden in the letters of 'colorado springs'.
'ados' in reverse letter order is 'SODA'.
(Other definitions for soda that I've seen before include "Sodium carbonate" , "pressurised liquid" , "Fizzy drink - chemical compound" , "Accompaniment to whisky" , "Type of bread, water or fountain" .)