Tom's explanation is very elaborate. ✬

Could you elaborate? ✬

Tom didn't seem inclined to elaborate and I didn't really want to know all the details anyway. ✬

Can you elaborate on this a little more? ✬

Can you elaborate? ✬

Would you elaborate? ✬

Tom cooked an elaborate meal for Mary and himself. ✬

Would you like me to elaborate? ✬

Could you elaborate on that? ✬

Would you care to elaborate? ✬