Thought this person would get caught in the act (6)
I believe the answer is:
deemed
'thought this person' is the definition.
'deemed' can be an answer for 'thought' (I've seen this before). I am not sure about the 'this person' bit.
'caught in the act' is the wordplay.
'caught' becomes 'me' (I can't explain this - if you can you should give a lot more credence to this answer).
'in the' means one lot of letters goes inside another.
'act' becomes 'deed' (deed is a kind of act).
'me' inserted into 'deed' is 'DEEMED'.
'would get' is the link.
Can you help me to learn more?
(Other definitions for deemed that I've seen before include "Considered, opined" , "Regarded, considered" , "'Judged, considered (6)'" , "Viewed as, reckoned" , "Judged, thought, considered" .)