The most common and most likely answer to this crossword clue is the 4 plus 1 plus 4 letter word LIKE A SHOT
I've seen this crossword clue in The Daily Telegraph
L
I
K
E
A
S
H
O
T
More clues leading to the result LIKE A SHOT
- Instantly fancy a go
- Large furniture shop's popular very quickly
- Instantly, love equally exciting
- Instantly approve when popular
- Large well-known store ruined immediately
- Willingly enjoy drink of spirits
- What picture editor might do without delay?
- Without hesitation, fate has sealed ex-president as initiator of hatred
- US president in US city taking crack willingly
- President’s in la-la land! Go — and quickly!
Buddy explains!

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.