Eve's son claiming mother is fabricating reptile (6)
I believe the answer is:
caiman
'reptile' is the definition.
(I know that caiman is a type of crocodilian)
'eve's son claiming mother' is the wordplay.
'eve's son' becomes 'cain' (biblical figure).
'claiming' indicates putting letters inside.
'mother' becomes 'ma' (ma can mean mother).
'cain' going around 'ma' is 'CAIMAN'.
'is fabricating' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Another definition for caiman that I've seen is " reptile".)