1) Clearly 2) Comprehensibly 3) Limpidly 4) Logically 5) Pellucidly 6) Perspicuously 1) Cogently 2) Coherently 3) Comprehensibly 4) In a clear and lucid manner 5) In a clear way 6) Limpidly 7) Normally 8) Pellucidly 9) Perspicuously 10) Rationally 11) With clarity 
• (adv.) In a lucid manner.
Lu'cid·ly adverb In a lucid manner. 
[adv] - in a clear and lucid manner
lucidly Brightly, clearly.
pellucidly adverb in a clear and lucid manner; `this is a lucidly written book`