Predict that the opposition leader may be in bed (4)
I believe the answer is:
bode
'predict' is the definition.
(synonyms)
'the opposition leader may be in bed' is the wordplay.
I cannot quite see how this works, but
'leader' could be 'e' (I've seen this in other clues) and 'e' is found in the answer.
The remaining letters 'bod' 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).
'that' acts as a link.
Can you help me to learn more?
(Other definitions for bode that I've seen before include "Augur (well or ill)" , "Presage" , "Augur (well, badly)" , "predict" , "Augur, foreshadow" .)