Corruptly use fiction? That’s easily picked up (10)
I believe the answer is:
infectious
'easily picked up' is the definition.
(I've seen this before)
'corruptly use fiction?' is the wordplay.
'corruptly' indicates an anagram.
'use'+'fiction'='usefiction'
'usefiction' is an anagram of 'INFECTIOUS'.
'that's' is the link.
(Other definitions for infectious that I've seen before include "Catching" , "Easily transmitted" , "(Of disease) catchable from others" , "Liable to spread disease" , "easily picked up" .)