It's right for a fellow to be on the far left (3)
I believe the answer is:
red
'be on the far left' is the definition.
'red' can be an answer for 'left' (red can informally mean communist). I'm not certain of the 'be on the far' bit.
'it's right for a fellow' is the wordplay.
'it's right' becomes 'r' (common abbreviation).
'for' means one lot of letters go next to another.
'a fellow' becomes 'ed' (I've seen this in other clues).
'r'+'ed'='RED'
'to' 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" .)