First Monday I say I see clothing with a disease-causing bacterium (7)
I believe the answer is:
microbe
'a disease-causing bacterium' is the definition.
(I've seen this before)
'first monday i say i see clothing' is the wordplay.
'first monday' becomes 'm' (ist letter of 'monday').
'i say i' becomes 'ic' (I can't explain this - if you can you should believe this answer much more).
'see clothing' becomes 'robe' (robe is a kind of clothing).
'm'+'ic'+'robe'='MICROBE'
'with' is the link.
Can you help me to learn more?
(Other definitions for microbe that I've seen before include "Disease-causing bacterium" , "Bug, germ" , "minor cause for complaint" , "Bacterium, for example" , "Bacillus" .)