As loaves go, this is a gem! (8)

I believe the answer is:

baguette

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

'gem' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

(Other definitions for baguette that I've seen before include "Bread roll" , "Long French breadstick" , "Long loaf - tube gate (anag)" , "Narrow French stick loaf" , "A long thin French loaf" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app