Vehicle that Rita constantly keeps in reverse (3-3)
I believe the answer is:
sno-cat
'vehicle' is the definition.
(Sno-cat is an example)
'rita constantly keeps in reverse' is the wordplay.
'keeps' says the answer is hidden in the clue.
'in reverse' shows that the letters should be reversed in order.
'tacons' is hidden within 'rita constantly'.
'tacons' reversed gives 'SNO-CAT'.
'that' is the link.
(Other definitions for sno-cat that I've seen before include "Arctic vehicle" , "Winter vehicle" .)