Chair part
(Other definitions for armrest that I've seen before include "sort of support is needed" , "Part of a chair - smarter (anag)" , "Chair or car seat part" , "giving a member support" , "support of chairperson?" .)
'chair part' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for arm that I've seen before include "Equip with a limb" , "5 [BRANCH]" , "Prime" , "What soldiers do" , "Authority" .)
'chair part' is the definition.
(I know that leg is part of chair)
This is the entire clue.
(Other definitions for leg that I've seen before include "Projecting support for chair or table" , "Poultry portion" , "Section of journey; limb" , "Limb; stage" , "Member" .)