The most common and most likely answer to this crossword clue is the 6 letter word DOGGED
I've seen this crossword clue in The Guardian
D
O
G
G
E
D
More clues leading to the result DOGGED
- Tenacious, if troubled
- Determined to get scrambled egg in terribly odd surroundings
- Determined to find “horse” in dictionary under D
- Determined to get female eating horse, then surprised ultimately
- Pursued in a persistent way
- Determined setter, perhaps, good with editor
- Determined old magistrate imprisoning leader of gang, and daughter
- Trailed behind, being determined
- Determined, was trailing
- Determined to follow good editor
Buddy explains!

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 DOGGED mean?
DOGGED verb- To pursue with the intent to catch.
- To follow in an annoying or harassing way.
- To fasten a hatch securely.
- To watch, or participate, in sexual activity in a public place.
- To intentionally restrict one's productivity as employee; to work at the slowest rate that goes unpunished.
- To criticize.
- To divide (a watch) with a comrade.
- Stubbornly persevering, steadfast
- Very