Cryptic crossword clue
Atomic variable in reserve American rocket launcher 7

The most common and most likely answer to this crossword clue is the 7 letter word BAZOOKA

B
A
Z
O
O
K
A

Buddy explains!

The straight part
We know that "rocket launcher" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rocket launcher = bazooka.
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 BAZOOKA mean?

BAZOOKA noun
  1. A primitive trombone having wide tubes.
  2. A shoulder-held rocket launcher used as an antitank weapon, developed by America during World War II and so-called from its resemblance to the bazooka musical instrument.
  3. (by extension) Any shoulder-fired rocket grenade launcher.
  4. (sexuality) A woman's breast.
BAZOOKA noun
  1. Crack cocaine.

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