Part of the craft of putting polonium on work dress (4,4)
I believe the answer is:
poop deck
'part of the craft of' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'polonium on work dress' is the wordplay.
'polonium' becomes 'Po' (Po is the chemical symbol for polonium).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'work' becomes 'op' (abbreviation for opus).
'dress' becomes 'deck' (I've seen this before).
'po'+'op'+'deck'='POOP DECK'
'putting' is the link.
Can you help me to learn more?
(Other definitions for poop deck that I've seen before include "platform" , "part of 37 [SHIP OF THE LINE]" , "Highest floor of ship" .)