The most common and most likely answer to this crossword clue is the 7 letter word ROUTINE
I've seen this crossword clue in The Times
R
O
U
T
I
N
E
More clues leading to the result ROUTINE
- Money drawn in by rake, as standard procedure
- As expected, wine unopened after heavy defeat
- Rake grabbing money exactly as usual
- Way to go about home system
- Normal behaviour in occupying road
- One way to limit batting practice
- Neurotic ignoring cold snaps as usual
- Debauched man saves money for habit
- Run-of-the-mill performance on Strictly?
- Standard number out in evening dresses
Buddy explains!

The straight part
We know that "system" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case system = routine.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 ROUTINE mean?
ROUTINE noun- A course of action to be followed regularly; a standard procedure.
- A set of normal procedures, often performed mechanically.
- A set piece of an entertainer's act.
- A set of instructions designed to perform a specific task; a subroutine.
- According to established procedure.
- Regular; habitual.
- Ordinary with nothing to distinguish it from all the others.