The most common and most likely answer to this crossword clue is the 8 letter word INVOLVED
I've seen this crossword clue in The Daily Telegraph
I
N
V
O
L
V
E
D
More clues leading to the result INVOLVED
Buddy explains!

The straight part
We know that "Implicated" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case implicated = involved.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 INVOLVED mean?
INVOLVED verb- To roll or fold up; to wind round; to entwine.
- To envelop completely; to surround; to cover; to hide.
- To complicate or make intricate, as in grammatical structure.
- To connect with something as a natural or logical consequence or effect; to include necessarily; to imply.
- To take in; to gather in; to mingle confusedly; to blend or merge.
- To envelop, enfold, entangle.
- To engage (someone) to participate in a task.
- To raise to any assigned power; to multiply, as a quantity, into itself a given number of times.
- Complicated.
- Associated with others, be a participant or make someone be a participant (in a crime, process, etc.)
- Having an affair with someone.