The most common and most likely answer to this crossword clue is the 5 plus 6 letter word ELBOW GREASE
E
L
B
O
W
G
R
E
A
S
E
More clues leading to the result ELBOW GREASE
- Vigorous rubbing of joint with oil
- Slob, we agree, adjusted to hard work
- Joint declaration of nation, great effort
- Agrees bowel movement is hard work
- We bear logs awkwardly close to house? Hard work
- Part of the EU said to be after joint effort
- . Shifting below, agrees it's hard work
- Inclination, changing gear, to cut extra hard work
- Crafty bowler traps Gavaskar in front with skilfulness and hard work
Buddy explains!

The straight part
We know that "hard work" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hard work = elbow grease.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.