Presumably this will bring you around to display of affection for old French biography (4,2,4)
I believe the answer is:
kiss of life
'presumably this will bring you around' is the definition.
The definition suggests a singular noun which matches the answer.
'display of affection for old french biography' is the wordplay.
'display of affection' becomes 'kiss' (I've seen this in another clue).
'for' means one lot of letters go next to another.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'french' becomes 'f'.
'biography' becomes 'life' (synonyms).
'kiss'+'o'+'f'+'life'='KISS OF LIFE'
'to' is the link.
Can you help me to learn more?
(Other definitions for kiss of life that I've seen before include "Act of resuscitation" , "Artificial respiration" , "Mouth-to-mouth resuscitation" , "first-aid" , "First aid treatment" .)