Slob running around cut up OK garment (7)
I believe the answer is:
blouson
'garment' is the definition.
(I've seen this before)
'slob running around cut up ok' is the wordplay.
'running' indicates an anagram.
'around' means one lot of letters goes inside another.
'cut' means to remove the last letter.
'ok' becomes 'on' (I can't justify this - if you can you should give a lot more credence to this answer).
'slob' anagrammed gives 'blos'.
'up' with its final letter taken off is 'u'.
'blos' enclosing 'u' is 'blous'.
'blous'+'on'='BLOUSON'
Can you help me to learn more?
(Other definitions for blouson that I've seen before include "Loose jacket" , "Garment" , "Short full jacket gathered in at waist" , "Loose-fitting jacket" .)