Think up plan to get Boris's address shortened (6)
I believe the answer is:
ideate
'think up' is the definition.
(I've seen this in another clue)
'plan to get boris's address shortened' is the wordplay.
I cannot quite see how this works, but
'plan' could be 'idea' (both can mean an intention) and 'idea' is present in the answer.
The remaining letters 'te' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for ideate that I've seen before include "Fancy" , "Form a picture of" , "Imagine (psychology), aid tee (anag.)" , "Form in the imagination" .)