Immigrants allowance? (5)

I believe the answer is:

grant

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

'allowance?' is the definition.
(allowancing is a kind of granting)

'immigrants' is the wordplay.
'GRANT' is hidden in amongst the letters.
But, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for grant that I've seen before include "Give or allow as a privilege" , "Cary, Duncan or Ulysses S?" , "US president" , "Greek, a soldier" , "Monetary aid" .)

I've seen this clue in the Evening Standard.

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