The most common and most likely answer to this crossword clue is the 3 plus 2 plus 1 plus 5 plus 4 letter word ALL IN A DAY’S WORK
I've seen this crossword clue in Financial Times
A
L
L
I
N
A
D
A
Y
â
€
™
S
W
O
R
K
Buddy explains!
The straight part
We know that "Part of what is expected/no trouble" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case part of what is expected/no trouble = all in a day’s work.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.