4: Surgery sites, briefly
7: Like any number finishing with '9'
11: One working with Linux, e.g.
15: Brittle aromatic resin
19: Bread pieces, to fondue
23: Guys' Broadway counterparts
27: Cudgel, in County Cork
41: Places to find literary titles
42: Straighten, as wheels
43: Marriage announcement
45: Davy Crockett hat sources
50: Word before irons or chains
52: ___ fiber (flax, hemp, ramie, or jute)
55: Dress fancily, with 'out'
56: Condensation phenomenon