The most common and most likely answer to this crossword clue is the 12 letter word SPATCHCOCKED
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Buddy explains!
The straight part
We know that "Hastily inserted" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hastily inserted = spatchcocked.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 SPATCHCOCKED mean?
SPATCHCOCKED verb- To cut poultry along the spine and spread the halves apart, for more even cooking when grilled.
- To interpolate, insert or sandwich (in or into)
- To prepare in haste.