Run to get a hint in mad scramble (3,4)
I believe the answer is:
rat race
'mad scramble' is the definition.
(I've seen this in another clue)
'run to get a hint' is the wordplay.
'run' becomes 'r' (cricket abbreviation).
'to get' says to put letters next to each other.
'hint' becomes 'trace' (synonyms).
'r'+'a'+'trace'='RAT-RACE'
'in' acts as a link.
(Other definitions for rat race that I've seen before include "Struggle to survive" , "Competitiveness in business - as for rodents?" , "life's futile struggle" , "The struggle for success" , "Continual routine of hectic competition" .)