Pig accepting messy home in a way (7)
I believe the answer is:
somehow
'in a way' is the definition.
(I've seen this in another clue)
'pig accepting messy home' is the wordplay.
'pig' becomes 'sow' (I've seen this before).
'accepting' indicates putting letters inside (inserted letters are accepted).
'messy' is an anagram indicator.
'home' is an anagram of '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" .)