6 down
Heart
admits
nothing
against
being
idle
(4,4)
Heart admits nothing against being idle (4,4)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition is being idle, meaning an engine ticking over. TICKER (slang for heart) admits inside it 'nothing' (O) plus 'against' (V, as in versus), splitting TICKER into TICK and ER around the inserted OV to give TICK-O-V-ER.