Visitor's initially embarrassed to break wind (5)
I believe the answer is:
guest
'visitor's' is the definition.
(someone visiting a place)
'initially embarrassed to break wind' is the wordplay.
'initially' says to take the initial letters.
'to break' indicates putting letters inside (inserted letters break the word apart).
'wind' becomes 'gust' (gust of wind).
The first letter of 'embarrassed' is 'e'.
'e' put into 'gust' is 'GUEST'.
(Other definitions for guest that I've seen before include "Person receiving another's hospitality" , "Conjectured audibly" , "company" , "Visitor to whom hospitality is extended" , "Recipient of hospitality" .)