Cryptic crossword clue
Foie gras paste is served in process of initiation 4,2,7

The most common and most likely answer to this crossword clue is the 4 plus 2 plus 7 letter word RITE OF PASSAGE

I've seen this crossword clue in The Daily Telegraph
R
I
T
E
O
F
P
A
S
S
A
G
E

Buddy explains!

The straight part
We know that "process of initiation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case process of initiation = rite of passage.
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.

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