Late-night puzzle

The telegraph quick crossword always has the first two or more clues combine to produce a word or phrase of some kind. For example 1 across may be ‘monk’ and 2 across ‘ease’. Yesterday’s was the following:

Longbow wood (3)
Part of west India (3)
Time long ago (4)
Entrance (3,2)
1990’s US Vice-President (2,4)
Principal (4)

This is fairly tricky without the other clues to give you letters, but none of the above answers are particularly obscure, it’s just getting the right combination. If you get it post in the comments that you have and email me, don’t reveal it for others to see. Dad eventually figured it out here.