The most common and most likely answer to this crossword clue is the 8 letter word EVERYDAY
I've seen this crossword clue in The Guardian
E
V
E
R
Y
D
A
Y
More clues leading to the result EVERYDAY
- Ordinary fruit picker runs yard extremely adeptly
- Journalist with a yen to cover up – exceedingly common
- Flat, unfinished lines ruined drama therapy – ultimately run of the mill?
- Weird TV Channel includes potty old English commemoration on 8 May about railway stock
- Five-year dye mixed – it’s quite normal
- Common illness fellow avoided starts to die away in couple of years
- Pedestrian always encounters many Ambassadors, primarily between junctions
- First woman online could be Doris — it's regular
- Routine of first lady at line from dawn to dusk
- Always happy in the end, festive occasion is ordinary
Buddy explains!

The straight part
We know that "Ordinary" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ordinary = everyday.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 EVERYDAY mean?
EVERYDAY noun- (rare) the ordinary or routine day or occasion
- Appropriate for ordinary use, rather than for special occasions
- Commonplace, ordinary