barebones mail on sunday

[jobjockey]

14 across expensive source of venison (two words)
15 down put on a performance of punishment over time.
(5)
??a?t

[netkey]

15 enact
punishment = cane
t = time

[maggi]

14 deer meat or dear meat perhaps

[rosamund911]

14a i put roe deer

[Ronknee]

I think it's Roe Deer, too, but can't work out how to arrive at the answer from the clue. Can anyone enlighten? Thanks.