The most common and most likely answer to this crossword clue is the 7 letter word HORATIO
H
O
R
A
T
I
O
More clues leading to the result HORATIO
- Hamlet’s friend’s house share not finalised
- Nelson’s hard speech after loss of navy’s foremost
- His friend has Hamlet’s first speech abridged
- Shakespearean husband has old relationship
- Hornblower‘s short speech after end of skirmish
- Good seafaring name for sailor back in Ohio perhaps
- Nelson’s short speech after opening of hostilities
- Naval man in house share that's curtailed
- Nelson maybe making short speech after end of skirmish
- Hornblower and his capital short speech
Buddy explains!

The straight part
We know that "Naval man" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case naval man = horatio.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.