Trevor Albert de Cleene was a New Zealand politician and lawyer. After gaining experience as a councillor with Palmerston North City Council, he was elected to Parliament for the Labour Party in 1981. He was a strong supporter of Rogernomics and was a minister outside cabinet. He resigned his ministerial portfolios in 1988 when Roger Douglas was sacked by David Lange. For his remaining parliamentary career, he was a backbencher known as one of the Three Musketeers. Later, he was a founding member of ACT New Zealand and some years later joined the National Party to help oppose Winston Peters in Tauranga.

Rogernomics were the neoliberal economic reforms promoted by Roger Douglas, the Minister of Finance between 1984 and 1988 in the Fourth Labour Government of New Zealand. Rogernomics featured market-led restructuring and deregulation and the control of inflation through tight monetary policy, accompanied by a floating exchange-rate and reductions in the fiscal deficit.