
1) Spanish arm
Found on
https://www.crosswordclues.com/clue/brazo

The Brazo missile was an American project, intended to produce an anti-radiation missile for air-to-air use. Developed by Hughes Aircraft and based on the AIM-7 Sparrow air-to-air missile, the Brazo underwent a series of successful test firings; however, the program was terminated at the end of its test program. ==Design and development== A joint ...
Found on
http://en.wikipedia.org/wiki/Brazo

Project to develop an anti-radar version of the Sparrow missile in 1972 [US]
Found on
https://www.encyclo.co.uk/local/20785
No exact match found.