Superlatively silly – like a cuckoo? (7)
I believe the answer is:
inanest
'a cuckoo?' is the definition.
(I have seen 'Most cuckoo' mean 'inanest' so perhaps 'cuckoo' could also mean 'inanest')
'superlatively silly' is the wordplay.
I cannot really see how this works, but
'silly' could be 'inane' (inane means silly or foolish) and 'inane' is present in the answer.
The remaining letters 'st' 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).
'like' is the link.
Can you help me to learn more?
(Other definitions for inanest that I've seen before include "Most silly" , "Exhibiting minimal sense" , "Most cuckoo" , "Most stupid" , "most senseless" .)