Ways to get mad or sad (5)
I believe the answer is:
roads
'ways' is the definition.
(I know this)
'mad or sad' is the wordplay.
'mad' indicates anagramming the letters.
'or'+'sad'='orsad'
'orsad' with letters rearranged gives 'ROADS'.
'to get' acts as a link.
(Other definitions for roads that I've seen before include "Ways, routes" , "Highways" , "Thoroughfares" , "an answer to all clues, initially" , "Routes for vehicles" .)