The most common and most likely answer to this crossword clue is the 7 letter word INSERTS
I've seen this crossword clue in The Guardian
I
N
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More clues leading to the result INSERTS
Buddy explains!

The straight part
We know that "implants" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case implants = inserts.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 INSERTS mean?
INSERTS noun- An image inserted into text.
- A promotional or instructive leaflet inserted into a magazine, newspaper, tape or disk package, etc.
- A mechanical component inserted into another.
- An expression, such as "please" or an interjection, that may occur at various points in an utterance.
- A sequence of DNA inserted into another DNA molecule.
- A pre-recorded segment included as part of a live broadcast.
- A close-up shot used to draw attention to a particular element of a larger scene.
- To put in between or into.