Enforced when I am ready to be photographed (7)
I believe the answer is:
imposed
'enforced' is the definition.
('impose' can be a synonym of 'enforce')
'i am ready to be photographed' is the wordplay.
I cannot really see how this works, but
'i' is found in the answer.
'am' could be 'posed' (posing is a kind of being) and 'posed' is found in the answer.
A single letter 'm' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'when' acts as a link.
Can you help me to learn more?
(Other definitions for imposed that I've seen before include "enforced" , "set as a task" , "Thrust oneself upon" , "Forced to be accepted" .)