The most common and most likely answer to this crossword clue is the 5 letter word TRINE
T
R
I
N
E
More clues leading to the result TRINE
Buddy explains!

The straight part
We know that "Triple" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case triple = trine.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 TRINE mean?
TRINE noun- A group of three things.
- An aspect of two astrological bodies when 120° apart.
- To put in the aspect of a trine.
- To hang; To execute (someone) by suspension from the neck.
- To go.
- Triple; threefold.
- Denoting the aspect of two celestial bodies which are 120° apart.