With child, filled with love etc (3,2,2)
I believe the answer is:
and so on
'etc' is the definition.
(I've seen this before)
'with child filled with love' is the wordplay.
'with' becomes 'and'.
'child' becomes 'son' (male child).
'filled with' is an insertion indicator.
'love' becomes 'o' (love means zero in tennis).
'son' going around 'o' is 'soon'.
'and'+'soon'='AND SO ON'
(Other definitions for and so on that I've seen before include "Continuing in the same way" , "Etc. (3.2.2)" , "Etc - in English and in full" , "I say no more" , "Et cetera" .)