Crossword Genius

One man's name for an anti-aircraft missile (3)

Ross

I believe the answer is:

sam

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I believe this is a quadruple definition!!

'one man's' is the first definition.

'name' is the second definition.

'for' acts as a link.

'an anti aircraft' is the third definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'missile' is the fourth definition.
(abbreviation for surface-to-air missile)

Can you help me to learn more?

(Other definitions for sam that I've seen before include "Uncle" , "Boy" , "together once" , "Casablanca piano player" .)

I've seen this clue in the Evening Standard.
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