Hamlet’s odd theory mostly about Polonius’s entrance? (6)

'hamlet's' is the definition.
(both can mean a small village)

'odd theory mostly about polonius's entrance?' is the wordplay.
'odd' is an anagram indicator.
'mostly' means to remove the last letter.
'about' means one lot of letters goes inside another.
'entrance?' suggests taking the first letters (I've seen 'entrance' mean this).
The first letter of 'poloniuss' is 'p'.
'theory' with its last letter taken off is 'theor'.
'theor' anagrammed gives 'thore'.
'thore' going around 'p' is 'THORPE'.