Maximally delay start of demonstration to shout from here? (7)
I believe the answer is:
rooftop
'shout from here?' is the definition.
(as in shouting from the rooftops)
'maximally delay start of demonstration to' is the wordplay.
I cannot quite see how this works, but
'of' could be 'o' and 'o' is present in the answer.
'to' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for rooftop that I've seen before include "High place in a building (from which to shout?)" , "Domestic vantage point" , "Minimum height for low flying" , "Elevated point" , "Of Porto (anag.)" .)