Trouble about love? (5)
I believe the answer is:
adore
'love?' is the definition.
(adoring is a kind of loving)
'trouble about' is the wordplay.
'trouble' becomes 'ado' (I've seen this before).
'about' becomes 're' (regarding).
'ado'+'re'='ADORE'
(Other definitions for adore that I've seen before include "Honour" , "Worship, idolise" , "Love (someone) deeply" , "Love, revere intensely" , "Love, worship" .)