Supplements (4)
'supplements' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ekes that I've seen before include "Makes supplies last longer" , "...out a living, barely makes do" , "Lengthens (out)" , "Rab C's extras" , "- - out: stretches" .)
'supplements' is the definition.
('addendum' can be a synonym of 'supplement')
This is the entire clue.
(Other definitions for addenda that I've seen before include "collection of extra material" , "Items added to a text" , "Codicils, riders or supplements" , "Additions to documents" , "Extra items put in book" .)