Think it's a trap I myself set outside (7)
I believe the answer is:
imagine
'think' is the definition.
(synonyms)
'a trap i myself set outside' is the wordplay.
I cannot quite see how this works, but
'a' is found in the answer.
'trap' could be 'gin' (gin is a kind of trap) and 'gin' is located in the answer.
'i' could be 'me' and 'me' is found within the leftover letters.
'myself' could be 'i' and 'i' is located in the answer.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for imagine that I've seen before include "Picture, conceive" , "Suppose; think up" , "Number one" , "Conceive in the mind" , "Enigma, I? (anag)" .)