Following son, we're off to get some plumbing (5)
I believe the answer is:
sewer
'some plumbing' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'following son we're off' is the wordplay.
'following' says to put letters next to each other.
'son' becomes 's' (genealogical abbreviation for son).
'off' indicates an anagram.
'were' anagrammed gives 'ewer'.
's'+'ewer' is 'SEWER'.
'to get' is the link.
Can you help me to learn more?
(Other definitions for sewer that I've seen before include "Embroiderer; soil pipe" , "Large pipe for carrying waste matter" , "Tailor" , "Drain - seamstress?" , "Filthy channel" .)