The most common and most likely answer to this crossword clue is the 8 letter word CAKEWALK
I've seen this crossword clue in The Guardian
C
A
K
E
W
A
L
K
Buddy explains!
The straight part
We know that "No sweat with this/dance" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case no sweat with this/dance = cakewalk.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 CAKEWALK mean?
CAKEWALK noun- A contest in which cake was offered for the best dancers.
- The style of music associated with such a contest.
- The dance, or strutting style of dance associated with such a contest.
- Something that is easy or simple, or that does not present a great challenge.
- To perform the cakewalk dance.