Love District Attorney's flipping speech (9)
I believe the answer is:
adoration
'love' is the definition.
(to adore someone is to love them)
'district attorney's flipping speech' is the wordplay.
'district attorney' becomes 'DA' (abbreviation).
'flipping' shows that the letters should be reversed in order.
'speech' becomes 'oration' (oration is a kind of speech).
'da' backwards is 'ad'.
'ad'+'oration'='ADORATION'
(Other definitions for adoration that I've seen before include "Feeling of profound love" , "high regard" , "high esteem" , "Honour" , "Worship, veneration" .)