One who used swords for railings? (6)
I believe the answer is:
fencer
'one who' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'swords for railings?' is the wordplay.
'swords' becomes 'r' (I can't justify this - if you can you should believe this answer much more).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'railings?' becomes 'fence' (I've seen this before).
'r' put after 'fence' is 'FENCER'.
'used' acts as a link.
Can you help me to learn more?
(Other definitions for fencer that I've seen before include "Maker of barriers; user of foil" , "One encloses" , "He sports with the sword" , "His sport is with the sword" , "One using foil, epee" .)