Pig accepting messy home in a way (7)
I believe the answer is:
somehow
'in a way' is the definition.
(I've seen this before)
'pig accepting messy home' is the wordplay.
'pig' becomes 'sow' (I've seen this before).
'accepting' means one lot of letters goes inside another (inserted letters are accepted).
'messy' is an anagram indicator.
'home' with letters rearranged gives 'meho'.
'sow' placed around 'meho' is 'SOMEHOW'.
(Other definitions for somehow that I've seen before include "In an unspecified manner" , "For an unknown reason; so who, me? (anag.)" , "In a way not yet specified" , "By hook or by crook" , "By one means or another" .)