Ordering scans online is meaningless (11)
I believe the answer is:
nonsensical
'meaningless' is the definition.
(similar in meaning)
'ordering scans online' is the wordplay.
'ordering' indicates anagramming the letters.
'scans'+'online'='scansonline'
'scansonline' with letters rearranged gives 'NONSENSICAL'.
'is' acts as a link.
(Other definitions for nonsensical that I've seen before include "Meaningless" , "Absurd, idiotic" , "Ridiculous" , "Like rubbish" , "Without meaning" .)