The most common and most likely answer to this crossword clue is the 3 plus 5 letter word TAP WATER
I've seen this crossword clue in The Times
T
A
P
W
A
T
E
R
More clues leading to the result TAP WATER
- Runner turned on a father protecting wife after time
- Drink milk with tea — stirred right
- See rebel entering spill drink?
- Weak prescription to treat paw injury?
- Drink milk before restaurant employee? One’s thrown out
- Drain fluid – suitable for drinking?
- Touch restaurant attendant, wanting one glass of this?
- Powercut? Pass candle round for drink
- Spray with milk before getting a cheap drink
- A part mixed with wet, running liquid
Buddy explains!

The straight part
We know that "Runner turned on" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case runner turned on = tap water.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.