The most common and most likely answer to this crossword clue is the 6 letter word ZENITH
Z
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H
More clues leading to the result ZENITH
- I recalled height on half frozen peak
- Japanese discipline, computing, hard to get to highest point
- Spike in measure of frequency’s inverted peak
- Frozen? It helps to cover top
- It’s the high point in a dozen, I think
- Religious school, one nearly the optimum
- . Summit success makes Henry go back to following a Buddhist doctrine
- Highest point of meditative thought hit badly
- Unknown man climbing to rescue fool in peak
- In Z, the surprising climax
Buddy explains!

The straight part
We know that "peak" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case peak = zenith.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 ZENITH mean?
ZENITH noun- The point in the sky vertically above a given position or observer; the point in the celestial sphere opposite the nadir.
- The highest point in the sky reached by a celestial body.
- (by extension) Highest point or state; peak.