
1) Amazon feeder 2) River in Ecuador
Found on
https://www.crosswordclues.com/clue/napo
[trade union] Napo (formerly the National Association of Probation Officers) is the trade union and professional association that represents probation staff including probation officers and other operational and administrative staff and Children and Family Court Advisory and Support Service staff in the United Kingdom. Napo was formed on 22...
Found on
http://en.wikipedia.org/wiki/Napo_(trade_union)

The Napo was a British-built Peruvian river gunboat of 98 tons displacement launched in 1920 and assigned to the Upper Amazon Flotilla. The Napo was powered by Yarrow wood-burning boilers providing a top speed of 12 knots and carried a complement of 22 and was armed with four 47 mm guns; two 37 mm guns; two 20 mm anti-aircraft guns and two machine-...
Found on
http://www.probertencyclopaedia.com/browse/RN.HTM

National Association of Probation Officers
Found on
https://www.encyclo.co.uk/local/21780

a South American river flowing from central Ecuador through NE Peru to the Amazon River. ab. 700 mi. (1125 km) long.
Found on
https://www.infoplease.com/dictionary/napo
No exact match found.