Washer is slanted to east constrained by limits of container (8)
I believe the answer is:
cleanser
'washer' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'slanted to east constrained by limits of container' is the wordplay.
'slanted' becomes 'leans' (I can't justify this - if you can you should give a lot more credence to this answer).
'to east' becomes 'e' (abbreviation).
'constrained by' indicates putting letters inside.
'limits of' suggests removing the centre.
'container' with its middle removed is 'cr'.
'leans'+'e'='leanse'
'leanse' placed inside 'cr' is 'CLEANSER'.
'is' is the link.
Can you help me to learn more?
(Other definitions for cleanser that I've seen before include "Lotion removing grime" , "Scan reel (anag.)" , "Cleaning cream or lotion" , "Purifying lotion" , "Eg, detergent" .)