Reverse tracks (5)
I believe the answer is:
tails
This clue is a double definition.
'reverse' is the first definition.
(thesaurus)
'tracks' is the second definition.
('tail' can be a synonym of 'track')
(Other definitions for tails that I've seen before include "Full evening dress for men" , "Coin-tossing call" , "the back of bears - bulls too" , "Animals' extremities" , "as opposed to heads" .)