DIY ledge on bookcase with rockers hard to lower (4-4)
I believe the answer is:
self-help
'bookcase with rockers hard to lower' is the definition.
I can't judge whether this defines the answer.
'diy ledge on' is the wordplay.
'diy' becomes 'elf' (I can't justify this - if you can you should believe this answer much more).
'ledge' becomes 's'help' (I've seen this before).
'on' is an insertion indicator (as in clothing 'on' a person).
'elf' placed inside 'shelp' is 'SELF-HELP'.
Can you help me to learn more?
(Other definitions for self-help that I've seen before include "Doing things without aid from others" , "Use of one's own ability without dependence on others" , "The use of one's own efforts to achieve" , "Doing things without assistance" , "Acting without assistance" .)