Pseudo switched, heading for interdisciplinary church organisation (4,3)
I believe the answer is:
opus dei
'church organisation' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'pseudo switched heading for interdisciplinary' is the wordplay.
'switched' indicates anagramming the letters (letters switch places).
'heading for' indicates taking the first letters.
The initial letter of 'interdisciplinary' is 'i'.
'pseudo' is an anagram of 'opusde'.
'opusde'+'i'='OPUS DEI'
Can you help me to learn more?
(Other definitions for opus dei that I've seen before include "Oedipus (anag) - divine liturgy - international Roman Catholic organisation" , "ritual worship" , "(Christian) liturgical duty to God" , "Religious group" , "Group of believers" .)