The most common and most likely answer to this crossword clue is the 9 letter word PENETRATE
I've seen this crossword clue in Independent
P
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More clues leading to the result PENETRATE
- Talk about troubled teen — be understood
- Run through quaggy peat, otherwise enter therein
- Go through take-home pay? Empty purse first
- See through empty promise to catch judge
- Enter parking space in Paris and get charge
- Bore to babble about English goal
- Enter and catch informer packing to go
- Enter a tent and peer around
- Get into exercises with clear speed
- Get to the bottom of babble about troubled teen
Buddy explains!

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 PENETRATE mean?
PENETRATE verb- To enter into; to make way into the interior of; to pierce.
- To achieve understanding of, despite some obstacle; to comprehend; to understand.
- To affect profoundly through the senses or feelings; to move deeply.
- To infiltrate an enemy to gather intelligence.
- To insert the penis into an opening, such as a vagina or anus.
- To move a piece past the defending pieces of one's opponent.