5 D Releases for faultless reserves? (6)
I've got Relets, meaning 'lets' (a house, for example) again - 'leases' would have the same sense. If you take the 're' off all the words, it was easier to see - and that's how I managed to get the 'reserves' idea. It's re - serves in tennis - and if you serve up a good(faultless) serve, the umpire calls 'let'. So 'faultless serves' becomes 'lets', and the 're' is stuck back on. I hope this makes some sort of sense!