The most common and most likely answer to this crossword clue is the 2 plus 4 letter word ON CALL
I've seen this crossword clue in The Daily Telegraph
O
N
C
A
L
L
More clues leading to the result ON CALL
- Previously almost everyone available
- Working phone available if required
- Supported by everyone after onset of COVID-19 – like some doctors?
- Ready to work at any time, almost every
- Side with name describing some doctors?
- It’s not nice when regularly observed, everyone standing by
- Standing by one detailed bid
- Ready to work once and for all after partial vacation
- Leg ring available if required
- Not off to visit, but ready to make one
Buddy explains!
The straight part
We know that "but ready to make one" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case but ready to make one = on call.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.