Here alms are limitless and a queen's in charge (5)
I believe the answer is:
realm
'charge' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'here alms are limitless and a queen's' is the wordplay.
'REALM' is hidden within the letters.
However, I am uncertain how the hidden word is indicated.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for realm that I've seen before include "the UK, perhaps" , "Area of influence" , "field of study" , "where ruler holds sway?" , "Dominion" .)