JSON notation limit 4000char ORA-40459

Extracting data from Oracle 12c database through Oracle SQL Developer using XML works nicely, however I need to convert this into a JSON extracted format and is returning errors.

ORA-40459: output value too large (actual: 4084, maximum: 4000)

40459. 00000 - "output value too large (actual: %s, maximum: %s)"

*Cause:   The provided JavaScript Object Notation (JSON) operator generated a

          result which exceeds the maximum length specified in the RETURN

          clause.

*Action:  Increase the maximum size of the data type in the RETURNING clause

          or use a CLOB/BLOB in the RETURNING clause.

I tested the suggested RETURNING CLOB in each statement section related to arrayagg but still return the above error.