Irrational and ridiculous, scrapping a book (4)

From Times Cryptic 29538, 15A —

15A — Irrational and ridiculous, scrapping a book (4) — SURD

  • Definition
    Definition found: 'Irrational' — Literally means "irrational" in mathematics!
  • Indicator
    Indicator found: 'scrapping'
  • Operation
    'scrapping' signals a deletion operation
  • Fodder
    Fodder: 'ridiculous, a book'
  • Abbreviation
    Abbreviations spotted: 'book' → B
  • Assembly
    ABSURD + A + B > ABSURDAB = SURD

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