Stout fellow at junction (3)
I believe the answer is:
fat
'stout' is the definition.
(similar in meaning)
'fellow at junction' is the wordplay.
I cannot quite understand how this works, but
'fellow' could be 'f' (abbreviation - of a society etc.) and 'f' is found in the answer.
'at' is within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for fat that I've seen before include "Obese, overweight" , "Portly" , "Cooking grease" , "Adipose tissue" , "Substantial" .)