Letters descend on cricket HQ (9)

I believe the answer is:

landlords

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'letters' is the definition.
(people who let property)

'descend on cricket hq' is the wordplay.
'descend' becomes 'land' (I've seen this in another clue).
'on cricket hq' becomes 'lords' (I am not sure about this - if you are sure you should believe this answer much more).
'land'+'lords'='LANDLORDS'

Can you help me to learn more?

(Other definitions for landlords that I've seen before include "They lease out properties" , "People in pubs" , "letters" , "maybe posted locally?" .)

I've seen this clue in The Sun.

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