What can suggest certain psychological states? Disturbed rest can (7)
I believe the answer is:
trances
'what can suggest certain psychological states?' is the definition.
I can't tell whether this definition defines the answer.
'disturbed rest can' is the wordplay.
'disturbed' indicates an anagram (the order of letters is disturbed).
'rest'+'can'='restcan'
'restcan' is an anagram of 'TRANCES'.
Can you help me to learn more?
(Other definitions for trances that I've seen before include "Hypnotic states" , "what half-conscious people experience?" , "Recants (anag.)" .)