The most common and most likely answer to this crossword clue is the 6 letter word BEAMER
I've seen this crossword clue in The Daily Telegraph
B
E
A
M
E
R
Buddy explains!

The straight part
We know that "Nasty cricket delivery/one smiling/one smiling" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case nasty cricket delivery/one smiling/one smiling = beamer.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 BEAMER mean?
BEAMER noun- A BMW; usually refers to a motorcycle, sometimes used to reference cars as well.
- An employee of International Business Machines Corporation (IBM).
- A ball, presumed to have been bowled accidentally, that does not bounce, but passes the batsman at head height.
- (chiefly NNES) A projector.
- A gymnast proficient with or specializing in the balance beam ("beam").