Crossword Genius

Hound Dog adapted into American black and white movie (9,3)

Ross

I believe the answer is:

groundhog day

I'm a little stuck... Click here to teach me more about this clue!

'white movie' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

'hound dog adapted into american black' is the wordplay.
'adapted' indicates an anagram.
'into' means one lot of letters goes inside another.
'american black' becomes 'gray' (I am not sure about this - if you are sure you should believe this answer much more).
'hound'+'dog'='hounddog'
'hounddog' with letters rearranged gives 'oundhogd'.
'oundhogd' put inside 'gray' is 'GROUNDHOG DAY'.

'and' is the link.

Can you help me to learn more?

(Other definitions for groundhog day that I've seen before include "Picture" , "Situation in which events are continually repeated" .)

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