Cryptic crossword clue
Tom caught in falsehood after outing in three parts 10

The most common and most likely answer to this crossword clue is the 10 letter word TRIPLICATE

I've seen this crossword clue in The Daily Telegraph
T
R
I
P
L
I
C
A
T
E

Buddy explains!

The straight part
We know that "in three parts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case in three parts = triplicate.
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 TRIPLICATE mean?

TRIPLICATE noun
  1. The making of three identical copies of something.
  2. Each of a set of three identical objects or copies.
TRIPLICATE verb
  1. To make three identical copies of something.
  2. To triple.
TRIPLICATE adjective
  1. Made thrice as much; threefold; tripled.

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