Need the parsing explained for:-
Dream weaver's dry in time of plenty - BOTTOM (Bottom the weaver from A Midsummer Night's Dream)
Instrument in part exchange for it's older version - FORTEPIANO (Instrument and it's about the only word that fits)
It's wasteful of girl to mix in hors d'oeuvre - PROFLIGATE (wasteful)
Is working hard to get women into constituencies - S?E?T? (there's really not many words that fit the pattern and I can't make a case for any of them)