He served as a representative from Bohol from 1925 through 1927, from 1935 to 1945 and was elected to a term in the Senate of the Philippines in 1946 after World War II.

In 1925, Clarin was elected to the House of Representatives as a delegate from Bohol's 2nd district, serving until 1927.

Three years later, he was elected as a delegate to the new unicameral National Assembly of the Philippines.

[2] Shortly after the elections, however, the Japanese invaded the Philippines as part of the Second World War.

For this, the newly elected Philippine Congress only went into session in 1945 after the liberation of the country by the Americans.