Present husband, boring pig! (4)
I believe the answer is:
show
'present' is the definition.
(synonyms)
'husband boring pig' is the wordplay.
'husband' becomes 'h' (abbreviation).
'boring' is an insertion indicator (some letters must 'bore' a hole into other letters).
'pig' becomes 'sow' (I've seen this before).
'h' put into 'sow' is 'SHOW'.
(Other definitions for show that I've seen before include "event" , "Expose" , "Point out - parade" , "Performance" , "Exhibit - present" .)