''In what way?''

• "Care to explain?"
• Request for elaboration
• "Want to explain that?"
• "By what method?"
• "Explain . . ."
• In what way?
• "Can you explain?"
• Question that demands an explanation
• "Explain your reasoning"

Wiktionary Word definitions in Wiktionary
adv. 1 however#Conjunction, in whatever manner. 2 However, to whatever extent.