Crossword Genius

Set subject to photograph (5)

Ross

I believe the answer is:

topic

I'm a little stuck... Click here to teach me more about this clue!

'set subject' is the definition.
'topic' can be an answer for 'subject' (as in a topic for discussion). I am not sure about the 'set' bit.

'to photograph' is the wordplay.
'photograph' becomes 'pic' (short for picture).
'to'+'pic'='TOPIC'

Can you help me to learn more?

(Other definitions for topic that I've seen before include "Issue (for discussion)" , "'Theme, subject (5)'" , "Subject matter of a conversation or discussion" , "Subject (of a talk, etc)" , "Something to discuss" .)

I've seen this clue in The Times.
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