The most common and most likely answer to this crossword clue is the 7 letter word ROSEBUD
I've seen this crossword clue in Independent
R
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More clues leading to the result ROSEBUD
- Did rebel call the wrong way? It'll prove a bloomer
- Something seen in our beds, developing?
- MacGuffin in Citizen Kane got out of bed and returned call
- Hint of blossom came up – familiar?
- One of those bloomers in our beds, possibly
- Unopened flower sadly obscured, not constant
- Pretty girl bored us terribly
- Pretty young woman stood up friend
- Attractive girl bored us unfortunately
- MacGuffin in ‘Citizen Kane’ bored us potty
Buddy explains!

The straight part
We know that "MacGuffin, in Citizen Kane" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case macguffin, in citizen kane = rosebud.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ROSEBUD mean?
ROSEBUD noun- The bud of a rose.
- (sometimes as a term of endearment) A pretty young woman.
- A debutante.
- Any of assorted small seashells with a pink or partially pink color, usually of the family Muricidae.
- (Cockney) A mouth.
- The indentation of a surface caused by an incorrect hammer strike (missing the nail)
- The anus.