Aims low: close to grass (5)

I believe the answer is:
means
'aims' is the definition.
The answer and definition can be both related to thinking as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'low close to grass' is the wordplay.
'low' becomes 'mean' (both can mean nasty).
'close to' says to take the final letters (the close of something is the end).
The last letter of 'grass' is 's'.
'mean'+'s'='MEANS'
Can you help me to learn more?
(Other definitions for means that I've seen before include "Money - is significant" , "Resources; intends" , "Available resources" , "Intends; wealth" , "way" .)
