Ale bottles on part of sink in standard sizes (4-1-6)
I believe the answer is:
pret-a-porter
'sink in standard sizes' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'ale bottles on part' is the wordplay.
I cannot quite see how this works, but
'ale' could be 'porter' (porter is a kind of ale) and 'porter' is located in the answer.
'on' could be 're' ('on' can be mean 'with reference to') and 're' is found within the answer.
'part' could be 'pt' (abbreviation) and 'pt' is found in the remaining letters.
A single letter 'a' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'of' is the link.
Can you help me to learn more?