The most common and most likely answer to this crossword clue is the 9 letter word INFOMANIA
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More clues leading to the result INFOMANIA
Buddy explains!
The straight part
We know that "Geek displays this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case geek displays this = infomania.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does INFOMANIA mean?
INFOMANIA noun- Impairment of concentration caused by frequent response to text messages, e-mails, and other forms of digital communication