All the same they suit some people (8)
I believe the answer is:
uniforms
'some people' is the definition.
Although both the answer and definition are plural nouns, I don't understand how one could define the other.
'all the same they suit' is the wordplay.
'all the same' becomes 'uniform' (I've seen this before).
'they suit' becomes 's' (I can't explain this - if you can you should give a lot more credence to this answer).
'uniform'+'s'='UNIFORMS'
Can you help me to learn more?
(Other definitions for uniforms that I've seen before include "What students may wear" , "Special clothes worn by particular groups" , "Formal attire of, say, army members" , "Distinctive clothing for members" , "Distincitve clothing for members" .)