Reckoned it means “with a pattern” (7)
I believe the answer is:
figured
'reckoned' is the definition.
('figure' can be a synonym of 'reckon')
'with a pattern' is the wordplay.
I cannot really understand how this works, but
'pattern' could be 'figure' (synonyms) and 'figure' is located in the answer.
A single letter 'd' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'it means' acts as a link.
Can you help me to learn more?
(Other definitions for figured that I've seen before include "Reckoned" , "Thought" .)