The most common and most likely answer to this crossword clue is the 7 letter word LURCHER
I've seen this crossword clue in The Times
L
U
R
C
H
E
R
More clues leading to the result LURCHER
- Cross appearing in church with Tempter going about?
- Dog walker under the influence of alcohol?
- Dog initially can’t hear piercing siren?
- Dog taken from pitch, about to be brought over
- Dog runs after bait, nipping child
- Dog, one enjoying food with name Rex?
- One staggering on all fours?
- One staggering mutt
- Half of chop thrown in, is one tempting for dog?
- In kennels, had it been drinking the St Bernard’s brandy?
Buddy explains!

The straight part
We know that "Cross" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cross = lurcher.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 LURCHER mean?
LURCHER noun- One who lurks or lies in wait; one who watches in order to rob or betray; a poacher.
- A type of crossbreed dog ― a cross between a sighthound and any other breed or the offspring of such crosses.
- A large nymphalid butterfly, Yoma sabina, of Australia and Asia.
- A glutton; a gormandizer.