Held everybody up which is unprofessional, indeed (7)
I believe the answer is:
delayed
'held' is the definition.
The definition and answer can be both to do with fundamental existence as well as being past participle verbs.
Maybe you can see a link between them that I can't see?
'everybody up which is unprofessional indeed' is the wordplay.
I cannot really see how this works, but
'unprofessional' could be 'lay' (I've seen this before) and 'lay' is present in the answer.
The remaining letters 'deed' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for delayed that I've seen before include "Held up, back" , "Deferred, postponed" , "Caused to be held up" , "Protracted" , "Made late" .)