Proper strategy to go after answer immediately (5,4)
I believe the answer is:
right away
'immediately' is the definition.
(synonyms)
'proper strategy to go after answer' is the wordplay.
'proper' becomes 'right' (synonyms).
'strategy' becomes 'way'.
'to go after' is a charade indicator (letters next to each other).
'answer' becomes 'a' (abbreviation eg in Q and A).
'way' after 'a' is 'away'.
'right'+'away'='RIGHT AWAY'
(Other definitions for right away that I've seen before include "This instant, without delay" , "Immediately" , "in no time" , "This very minute, without delay" , "without hesitation" .)