Thin people with terribly pale bones (9)
I believe the answer is:
beanpoles
'thin people' is the definition.
'beanpoles' can be an answer for 'people' (I have seen 'skinny people' mean 'beanpoles' so perhaps 'people' could also mean 'beanpoles'). I am not certain of the 'thin' bit.
'terribly pale bones' is the wordplay.
'terribly' indicates anagramming the letters.
'pale'+'bones'='palebones'
'palebones' anagrammed gives 'BEANPOLES'.
'with' is the link.
Can you help me to learn more?
(Other definitions for beanpoles that I've seen before include "skinny people" , "Tall and thin people" .)