Quick, spry (6)
I believe the answer is:
nimble
I believe this clue is a double definition.
'quick' is the first definition.
(synonyms)
'spry' is the second definition.
(I know that spry can be written as nimble)
(Other definitions for nimble that I've seen before include "'Agile, spry (6)'" , "Agile - alert" , "Agile, sprightly" , "Swift, active" , "Quick, agile" .)