Dynamic query in PIVOT IN clause - oracle

Question

I need to write a dynamic query inside In clause of pivot query in oracle 11g. With Pivot xml, it is possible, but I do not need the xml one. Here is the code snippet.
WITH pivot_data AS (
select cu.id, u.topic, cu.first_name, cu.last_name, cu.email,
trunc(cu.REGISTRATION_DATE) Register_Date,
trunc(min(u.view_date)) First_Visit,
trunc(max(u.view_date)) Last_Visit,
nvl(sum(u.user_visits),0) Visits,
nvl(sum(u.time_in_topic),0) Time_in_Topic,
ffl.label label, ffv.field_value val
from ACTIVE_USER_VIEWS_BY_TOPIC u
LEFT join cl_user cu
on u.user_id=cu.id
LEFT JOIN CL_PROFILE_FIELD_LABEL ffl
on ffl.cl_customer_accounts_id=cu.cl_customer_accounts_id
LEFT JOIN CL_PROFILE_FIELD_VALUE ffv
on ffl.id = ffv.profile_field_label_id and ffv.user_id= cu.id
LEFT JOIN CL_PROFILE_FIELD_ASSIGNMENT ffa
on ffl.id = ffa.profile_field_label_id
where ffl.cl_customer_accounts_id = (
select cl_customer_accounts_id
from CL_USER where ID = cu.id)
and ffl.ENABLED = 'Y'
and u.PURCHASED_PRODUCT_ID = 582002861
and REGEXP_LIKE (u.topic,
'difficult_interactions|customer_focus|leading_people' )
group by cu.id, u.topic, cu.first_name, cu.last_name, cu.email,
cu.REGISTRATION_DATE, trunc(u.view_date,'MONTH'), ffl.label,
ffv.field_value
)
SELECT *
FROM pivot_data
PIVOT (
max(val)
FOR label
IN ('Flexfield1' AS Flexfield1, 'Flexfield2' AS Flexfield2,
'Flexfield3' AS Flexfield3, 'Flexfield4' AS Flexfield4,
'Flexfield5' AS Flexfield5, 'Flexfield6' AS Flexfield6,
'flexfield021' AS flexfield021, 'sdcs' AS sdcs)
)
I have the query for dynamic data creation i.e.
SELECT DISTINCT
LISTAGG('''' || label || ''' AS ' || label,',')
WITHIN GROUP (ORDER BY label) AS temp_in_statement
FROM (
select distinct label
from cl_profile_field_label
where cl_customer_accounts_id=(
select cl_customer_accounts_id
from cl_purchased_product
where id=582002861));
But if I put the dynamic query inside pivot IN clause, I am getting the error as ORA-00936: missing expression. Please help me out.