Hey! Answer the roll call! (4)

I believe the answer is:

here

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

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

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for here that I've seen before include "In attendance" , "Hither" , "In this place - present" , ""___ be dragons" (old map inscription?)" , "To hand" .)

I've seen this clue in the Evening Standard.

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