The properties that make a wood suitable for woodenclock construction are :-
Medium to Hardwood
Fine grained
Retains detail when machined and sanded
Resists splintering
Low distortion after machining
The woods listed here would all be suitable for the construction of a wooden clock.
Apple
Boxwood
Birch
Cherry
Holly
Hornbeam
Maple
Pear
Sycamore
Tupelo
Walnut
Encyclopedia Britannica
British trees guide
North American Tree Guide
The Hardwood Handbook
The Hardwood imformation centre
An excellent article on the choice of the correct woods can be found here

A craftsmans challenge