Corrupt Tory breaks first promise with queen's retreat (5,5)
I believe the answer is:
ivory tower
'retreat' is the definition.
(I've seen this in another clue)
'corrupt tory breaks first promise with queen's' is the wordplay.
'corrupt' indicates anagramming the letters (a corrupted form).
'breaks' is an insertion indicator (inserted letters break into the word).
'first promise' becomes 'ivo' (I can't explain this - if you can you should give a lot more credence to this answer).
'with' becomes 'w' (abbreviation).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'tory' is an anagram of 'oryt'.
'oryt' placed inside 'ivo' is 'ivoryto'.
'ivoryto'+'w'+'er'='IVORY TOWER'
Can you help me to learn more?
(Other definitions for ivory tower that I've seen before include "academic position" , "State of seclusion from worldly realities" , "Academia (seen as secluded)" , "Seclusion from ordinary life" .)