The most common and most likely answer to this crossword clue is the 8 letter word GUNSMITH
I've seen this crossword clue in Independent
G
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S
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H
More clues leading to the result GUNSMITH
- Cosy up with German husband - his business is in pieces?
- Turn cosy with story to tell, one providing musketeers?
- Arms manufacturer Sun might suspect
- MiGs hunt lawless arms producer
- Thin gums treated by someone with small arms?
- Heartless man is thug, horrible person with weapons
- One who profits from keeping people up in arms
- Worker with small arms finds Cambridge college hard after comfortable upbringing
- Arms manufacturer’s comfortable in retrospect with broadcast fiction
- One works with lifeless arms
Buddy explains!

The straight part
We know that "Arms manufacturer/Sun" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case arms manufacturer/sun = gunsmith.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 GUNSMITH mean?
GUNSMITH noun- A person skilled in the repair and servicing of firearms.