Delayed volunteers at home indeed (8)
I believe the answer is:
detained
'delayed' is the definition.
('detain' can be a synonym of 'delay')
'volunteers at home indeed' is the wordplay.
I cannot really understand how this works, but
'volunteers' could be 'ta' (abbreviation for Territorial Army) and 'ta' is found in the answer.
'at' could be 'in' (synonymous in some cases - eg at school, in school) and 'in' is found within the answer.
The remaining letters 'deed' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for detained that I've seen before include "Delayed or confined" , "Under restraint" , "Remanded or delayed" , "Kept (in custody)" , "Deaden it (anag.)" .)