Twits adopting universal digital storage networks (6)

I believe the answer is:
clouds
'digital storage networks' is the definition.
Although both the answer and definition are verbs in their -s form, I don't understand how they can define each other.
'twits adopting universal' is the wordplay.
'twits' becomes 'clods' (I am not sure about this - if you are sure you should believe this answer much more).
'adopting' is an insertion indicator (inserted letters are taken on or adopted).
'universal' becomes 'U' (film certificate).
'clods' enclosing 'u' is 'CLOUDS'.
Can you help me to learn more?
(Other definitions for clouds that I've seen before include "They float in the atmosphere" , "Masses of vapour floating in the atmosphere" , "''I've looked at .... that way'' (Joni Mitchell)" , "work by 3 [FRAYN] ?" , "Visible masses suspended at considerable altitude" .)
