Cryptic crossword clue
Kiss in Sun alone is treated as platonic 3-6

The most common and most likely answer to this crossword clue is the 10 letter word NON-SEXUAL

N
O
N
-
S
E
X
U
A
L

Buddy explains!

The straight part
We know that "platonic" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case platonic = non-sexual.
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.

Crossword Answer definitions

NON-SEXUAL adjective
  1. Asexual; lacking sexual reproductive capabilities; neuter.
  2. Not involving sexuality or sexual arousal; platonic

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