Brigades' dismissed base network (4)

I believe the answer is:

grid

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

'network' is the definition.
(grid is a kind of network)

I can't explain the rest of the clue.

(Other definitions for grid that I've seen before include "entries in this" , "method to find map reference" , "Source of power" , "Network of crossing parallel lines" , "a network of squares as in this puzzle" .)

I've seen this clue in the Irish Times.

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