Misspelt the Genoese name for an eastern monument (10)
I believe the answer is:
stonehenge
'monument' is the definition.
(I know that Stonehenge is a monument)
'misspelt the genoese name for an eastern' is the wordplay.
I cannot really understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
'name' could be 'n' (common abbreviation e.g. on forms) and 'n' is found in the answer.
'eastern' could be 'e' and 'e' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for stonehenge that I've seen before include "Salisbury Plain circle" , "Druid comes here" , "prehistoric pillars" , "Wiltshire attraction" , "Megalithic monument on Salisbury Plain" .)