Without a shred of doubt, who made Thomas crooked (4)
I believe the answer is:
awry
'crooked' is the definition.
(similar in meaning)
'without a shred of doubt who made thomas' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
The remaining letters 'wry' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for awry that I've seen before include "Crooked; amiss" , "Skewwhiff" , "Askance, askew" , "oblique" , "out of uniform?" .)