Fart aloud finally with baked beans cooked in guest house (3,3,9)
I believe the answer is:
bed and breakfast
'guest house' is the definition.
(bed and breakfast matches up with the definition guest house)
'fart aloud finally with baked beans cooked' is the wordplay.
'finally' indicates one should take the final letters.
'with' means one lot of letters go next to another.
'cooked' is an anagram indicator (letters cooked into a new form).
The final letter of 'aloud' is 'd'.
'fart'+'d'+'baked'+'beans'='fartdbakedbeans'
'fartdbakedbeans' with letters rearranged gives 'BED-AND-BREAKFAST'.
'in' is the link.
(Other definitions for bed and breakfast that I've seen before include "Guest house (colloq,)" , "Accommodation, hopefully temporary" , "Trade in share options" , "Common hotel arrangement" , "Fed up after retirement" .)