Crossword Genius

Crowded and comparatively friendly (6)

Ross

I believe the answer is:

aswarm

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

'crowded' is the definition.
(I've seen this before)

'comparatively friendly' is the wordplay.
'comparatively' becomes 'as' (I am not sure about this - if you are sure you should believe this answer much more).
'friendly' becomes 'warm' (associated in meaning).
'as'+'warm'='ASWARM'

'and' is the link.

Can you help me to learn more?

(Other definitions for aswarm that I've seen before include "Teeming" , "Like bees often are" , "crowds everywhere" , "Crawling" , "Crowded" .)

I've seen this clue in The Independent.
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