Speed that's mad, speed that's reckless (9)
I believe the answer is:
desperate
'reckless' is the definition.
(I've seen this before)
'speed that's mad speed' is the wordplay.
'that's mad' indicates an anagram.
'speed' becomes 'rate' (the speed at which something happens).
'speed' anagrammed gives 'despe'.
'despe'+'rate'='DESPERATE'
'that's' is the link.
(Other definitions for desperate that I've seen before include "Reckless" , "critical" , "Hopeless; extremely bad" , "Without hope" , "Feeling hopeless" .)