Rests but gets ready to be photographed again (7)
I believe the answer is:
reposes
'rests' is the definition.
('repose' can be a synonym of 'rest')
'gets ready to be photographed again' is the wordplay.
I cannot really understand how this works, but
'be' could be 'pose' (posing is a kind of being) and 'pose' is located in the answer.
'again' could be 're' (prefix meaning 'again') and 're' is found within the answer.
A single letter 's' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'but' acts as a link.
Can you help me to learn more?
(Other definitions for reposes that I've seen before include "lies" , "Rests" , "takes it easy" , "Takes new position" .)