The most common and most likely answer to this crossword clue is the 8 letter word TROLLING
I've seen this crossword clue in The Guardian
T
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More clues leading to the result TROLLING
Buddy explains!
The straight part
We know that "looking for reaction to posting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case looking for reaction to posting = trolling.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 TROLLING mean?
TROLLING verb- To saunter.
- To trundle, to roll from side to side.
- To draw someone or something out, to entice, to lure as if with trailing bait.
- (by extension) To fish using a line and bait or lures trailed behind a boat similarly to trawling; to lure fish with bait.
- To angle for with a trolling line, or with a hook drawn along the surface of the water; hence, to allure.
- To fish in; to try to catch fish from.
- To stroll about in order to find a sexual partner.
- (to post inflammatory material so as) to attempt to lure others into combative argument for purposes of personal entertainment and/or gratuitous disruption, especially in an online community or discussion
- (by extension) To incite anger (including outside of an Internet context); to provoke, harass or annoy.
- To move circularly; to roll; to turn.
- To send about; to circulate, as a vessel in drinking.
- To sing the parts of in succession, as of a round, a catch, and the like; also, to sing loudly, freely or in a carefree way.
- The act of one who trolls (in various senses).