Judo master lacks one feeling (5)
I believe the answer is:
sense
'feeling' is the definition.
(feeling can mean a sensation)
'judo master lacks one' is the wordplay.
'judo master' becomes 'sensei' (I've seen this in another clue).
'lacks' indicates named letters should be taken away.
'one' becomes 'i' (Roman numeral).
'sensei' with 'i' taken out is 'SENSE'.
(Other definitions for sense that I've seen before include "Perceive; meaning" , "Gumption -- feeling" , "Perceive, detect" , "Perceptual faculty" , "Meaning - feeling" .)