Party has a politician that's informative (10)
I believe the answer is:
revelatory
'informative' is the definition.
Both the definition and answer are adjectives. Maybe there's an association between them I don't understand?
'party has a politician' is the wordplay.
'party' becomes 'revel' (I've seen this before**).
'has' means one lot of letters go next to another.
'politician' becomes 'tory' (I've seen this before).
'revel'+'a'+'tory'='REVELATORY'
'that's' is the link.
Can you help me to learn more?
(Other definitions for revelatory that I've seen before include "spilling the beans" , "like exposure" , "disclosure" , "spilling secrets" , "Disclosing something hitherto unknown" .)