Cross current with speed (5)
I believe the answer is:
irate
'cross' is the definition.
(thesaurus)
'current with speed' is the wordplay.
'current' becomes 'i' (symbol for electric current).
'with' is a charade indicator (letters next to each other).
'speed' becomes 'rate' (rate is a kind of speed**).
'i'+'rate'='IRATE'
(Other definitions for irate that I've seen before include "Wrathful" , "Infuriated" , "Not happy" , "Angry, annoyed" , "Annoyed, exasperated" .)