Hardly looked upon with pleasure (4)
I believe the answer is:
ugly
'hardly looked' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs can sometimes mean the same thing.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for ugly that I've seen before include "describe duckling thus" , "Visually unpleasant; dangerous (situation)" , "Unprepossessing, repulsive" , "Leave of absence" , "Menacing" .)