'House full': getting out of it is beneficial (6)
I believe the answer is:
useful
'beneficial' is the definition.
(I've seen this before)
'house full getting out of' is the wordplay.
'out of' says the answer is hidden in the clue.
'USEFUL' is hidden in the letters of 'house full getting'.
'it is' is the link.
(Other definitions for useful that I've seen before include "Very able, competent" , "Proficient; handy" , "Of service" , "Practicable" , "Advantageous, serviceable" .)