Each of these clues indicates a two-word phrase wherein the two words are anagrams of each other. The phrases are:
More salacious windstorm (9) — RAUNCHIER HURRICANE
Act of counting climbers (6) — MOUNTAINEER ENUMERATION
Logical justifications for 100 members of Congress (7) — SENATORIAL RATIONALES
One who opposes a lack of progress (5) — STAGNATION ANTAGONIST
Slogans for thieves (3) — STEALING TAGLINES
Hen that produces eggs ahead of schedule (5) — EARLY LAYER
Most rad antiderivatives (3) — GNARLIEST INTEGRALS
Least pious meridians (8) — UNGODLIEST LONGITUDES
Indexing into both words of the phrases spells out REARRANGE GYRATED, which is another anagram clue; the final answer is TRAGEDY, which is indeed an anagram of GYRATED.