The most common and most likely answer to this crossword clue is the 5 letter word SYSOP
S
Y
S
O
P
More clues leading to the result SYSOP
Buddy explains!

The straight part
We know that "techie" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case techie = sysop.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 SYSOP mean?
SYSOP noun- A system operator, especially someone who administers an online communications system or bulletin board.
- (WMF jargon) An administrator on a wiki.
- To work as a sysop.
- To give someone sysop privileges.