Was dishonest in giving a boy only 1lb (4)
I believe the answer is:
lied
'was dishonest' is the definition.
(lying is being dishonest)
'giving a boy only 1lb' is the wordplay.
I cannot really see how this works, but
'boy' could be 'ed' (short for Edward) and 'ed' is found within the answer.
The remaining letters 'li' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'in' is the link.
Can you help me to learn more?
(Other definitions for lied that I've seen before include "Told an untruth" , "German romantic recital piece" , "gave a false impression" , "Deceived with words" , "Produced pork pie" .)