Daughter rejected Yale, beginning to stack shelves (6)
I believe the answer is:
delays
'shelves' is the definition.
The answer and definition can be both to do with fundamental existence as well as being verbs in their -s form.
Perhaps you can see an association between them that I don't see?
'daughter rejected yale beginning to stack' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'rejected' says the letters should be written backwards.
'beginning to' suggests taking the first letters.
The initial letter of 'stack' is 's'.
'yale' backwards is 'elay'.
'd'+'elay'+'s'='DELAYS'
Can you help me to learn more?
(Other definitions for delays that I've seen before include "Holds up, impedes" , "Hinders, makes late" , "Hinders; puts off" , "From waits" , "Procrastinations or postponements" .)