Daily Mail Prize Crossword Tuesday February 18Th 2014

[MiloL]

I have got the answers to these two clues, but cannot see the reasoning. Can some one help me please?

17 across Munching this with a gin spoils a good night (3,3) answer "Hot Dog"

20 across Originator or denizen of mews? (5,3) answer "Alley cat".

Many thanks if someone can help!

[Psybbo]

mews ally and cat meows?

[Psybbo]

alley^^

[Psybbo]

good night less gin

[rideouta]

If you take the letters gin out of the final 2 words in the clue good night you are left with goodht which is an anagram of hot dog.

[MiloL]

Thanks all!

[boxtops]

is the clue "with a gin" or "without a gin"?

[Mamyalynne]

17a) Munching this with a gin spoils good night (3,3)

[Mamyalynne]

Munching this( HOT DOG) with a (GIN) spoils (ANAGRAMS)good night