Love argument about transport (7)
I believe the answer is:
worship
'love' is the definition.
(worship is a kind of love)
'argument about transport' is the wordplay.
'argument' becomes 'row' (I've seen this before).
'about' says the letters should be written backwards.
'transport' becomes 'ship' (ship is a kind of transport**).
'row' reversed gives 'wor'.
'wor'+'ship'='WORSHIP'
(Other definitions for worship that I've seen before include "idolisation" , "what can priest offer?" , "Adore, adulate" , "Reverence for a divine being" , "Revere" .)