Turning blue, he's getting runs (6)
I believe the answer is:
dashes
'runs' is the definition.
(dash is a kind of run)
'turning blue he's getting' is the wordplay.
'turning' says the letters should be written backwards.
'blue' becomes 'sad' (similar in meaning).
'getting' says to put letters next to each other.
'sad' back-to-front is 'das'.
'das'+'hes'='DASHES'
(Other definitions for dashes that I've seen before include "Strokes" , "flies!" , "Runs fast with shades" , "Darts" , "Quick run or sudden rush" .)