I traded with a crook, and beamed (8)
I believe the answer is:
radiated
'beamed' is the definition.
('radiate' can be a synonym of 'beam')
'i traded with a crook' is the wordplay.
'with' says to put letters next to each other.
'crook' indicates an anagram (a crooked or broken form of the letters).
'i'+'traded'+'a'='itradeda'
'itradeda' anagrammed gives 'RADIATED'.
'and' acts as a link.
(Other definitions for radiated that I've seen before include "Sent out beams or waves, like house heater" , "Emitted in the form of rays or waves" .)