Thought I would get enigma solved (8)
I believe the answer is:
imagined
'thought' is the definition.
('imagine' can be a synonym of 'think')
'i would get enigma solved' is the wordplay.
'i would' becomes 'I'd'.
'get' is an insertion indicator.
'solved' indicates an anagram (the anagram must be solved).
'enigma' anagrammed gives 'magine'.
'id' going around 'magine' is 'IMAGINED'.
(Other definitions for imagined that I've seen before include "Supposed" , "Formed a mental picture" , "Formed a mental image" , "Dreamt up" , "Created mentally" .)