Clare was born in
Hammersmith, London, on 30 September 1950. He moved with his family from London to
Cape Town, South Africa, where he attended
St George's Grammar School. Clare joined the
Royal Navy as a
seaman at in 1966, aged 15, and rose to become a
rear admiral in 1999, serving in a NATO appointment before leaving the service voluntarily in 2000 to take up the role of Director of the
National Maritime Museum, Greenwich. During his naval career he studied at the
Britannia Royal Naval College, Dartmouth (1972), the
Royal Naval Staff College, Greenwich, and the
Royal College of Defence Studies (1993). He was Military Assistant to the
Minister of State for the Armed Forces (1989–91) and the Assistant Director of Navy Plans (Ships) (1993–96). Clare served at sea in , , , , and . His commands included the
minehunter the
destroyers (1987–89) and (1991–92), and the
aircraft carrier (1996–97). He was
captain of the Third Destroyer Squadron in 1991–92 and in 1998–99 was
commodore of the Britannia Royal Naval College, where he was responsible for preparing new entrant officers for their careers. While Commodore at the college he founded the Britannia Museum, opening the college to public visitors for the first time. Clare was a trustee of HMS
Bronington between 1989 and 1999, after she was decommissioned from the Royal Navy. He was vice-president of the Bronington Trust in 1999 until the Trust ceased to exist in 2002. He edited the book ''HMS Bronington: A Tribute to One of Britain's Last Wooden Walls And a Celebration of The Ton Class'', which was published in 1996. ==Museums career==