Unexpectedly having run short of little boy’s clothes? (3,2,3,4)
I believe the answer is:
out of the blue
'unexpectedly' is the definition.
('out of the blue' can be a synonym of 'unexpectedly')
'run short of little boy's clothes?' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is found within the answer.
'clothes?' could be 'blue' (blue is a kind of clothes) and 'blue' is present in the answer.
This explanation may well be incorrect...
'having' is the link.
Can you help me to learn more?
(Other definitions for out of the blue that I've seen before include "From nowhere" , "Suddenly" , "Without warning" , "Entirely unexpectedly" , "Quite unexpectedly" .)