Trump's enforcers limit what Pole may display (3-3)
I believe the answer is:
ice-cap
'what pole may display' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'trump's enforcers limit' is the wordplay.
'trump's enforcers' becomes 'ice' (I can't explain this - if you can you should believe this answer much more).
'limit' becomes 'cap' (capping is a kind of limiting).
'ice'+'cap'='ICE-CAP'
Can you help me to learn more?
(Another definition for ice-cap that I've seen is " Permanently frozen mass".)