It's right for a fellow to be on the far left (3)
I believe the answer is:
red
'far left' is the definition.
'red' can be an answer for 'left' (red can informally mean communist). I'm not sure about the 'far' bit.
'it's right for a fellow to be on' is the wordplay.
'it's right' says to take the final letters (I've seen 'right of' mean this (letter on the rightmost end of the word)).
'a fellow' becomes 'ed' (short for Edward).
'to be on' means one lot of letters go next to another.
The last letter of 'for' is 'r'.
'r'+'ed'='RED'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for red that I've seen before include "Flushed" , "Colour of garnets" , "Very angry, seeing this" , "Merchant flag" , "14 -- breed of 4" .)