Crossword Genius

Back on coastal area shortly with new weapons (7)

Ross

I believe the answer is:

rearmed

I'm a little stuck... Click here to teach me more about this clue!

'new weapons' is the definition.
(I've seen this before)

'back on coastal area shortly' is the wordplay.
I cannot quite see how this works, but
'back' could be 'rear' (something's rear is its back) and 'rear' is present in the answer.
The remaining letters 'med' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'with' acts as a link.

Can you help me to learn more?

(Other definitions for rearmed that I've seen before include "tooled up once more" , "new weapons" .)

I've seen this clue in The Telegraph.
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