The most common and most likely answer to this crossword clue is the 8 letter word ECONOMIC
I've seen this crossword clue in Financial Times
E
C
O
N
O
M
I
C
More clues leading to the result ECONOMIC
- Online magazine keeps running commercial
- Efficient English wag keeps working
- In income distribution, company is thrifty
- English publication receives refusal, being financially viable
- Dandy online maybe keeps on being viable
- Financially viable English periodical holding on
- Internet publication covering working in business
- Small number entertained by English comedian being cheap
- Funnily, one comic referred to business
- With new income around, company becomes profitable?
Buddy explains!

The straight part
We know that "viable" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case viable = economic.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 ECONOMIC mean?
ECONOMIC adjective- Pertaining to an economy.
- Frugal; cheap (in the sense of representing good value); economical.
- Pertaining to the study of money and its movement.