Technique Freud employed changes as I recite on sofa (4,11)
I believe the answer is:
free association
'technique' is the definition.
(I have seen 'Freudian technique' mean 'free association' so perhaps 'technique' could also mean 'free association')
'changes as i recite on sofa' is the wordplay.
'changes' indicates an anagram.
'as'+'i'+'recite'+'on'+'sofa'='asireciteonsofa'
'asireciteonsofa' anagrammed gives 'FREE ASSOCIATION'.
'freud employed' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for free association that I've seen before include "to provide a useful train of thought" , "Psychoanalytical test" , "Freudian technique" , "Organisation not making charge" , "Trick cyclist's technique" .)