Harbour, perfect place to drop an E (5)
I believe the answer is:
haven
'harbour' is the definition.
(I know that harbour can be written as haven)
'perfect place to drop an e' is the wordplay.
'perfect place' becomes 'heaven'.
'to drop' indicates named letters should be taken away.
'heaven' with 'e' taken out is 'HAVEN'.
(Other definitions for haven that I've seen before include "Safe port" , "Harbour - shelter" , "Shelter (for ships)" , "Harbour, small port" , "A peaceful refuge" .)