The phrase "additional answer" is correct and usable in written English.
It can be used when referring to an extra response or piece of information that supplements a previous answer.
Example: "If you need more clarification, I can provide an additional answer to your question."
Alternatives: "further response" or "supplementary answer".
Additional answer: it's actually quite nice to occasionally turn people on to good stuff and play a small role in the industry of human happiness (and also, dissuade them from wasting their time and money on bad stuff).
A positive answer to the first question "I have been running today" opens up for additional answer fields to report the distance, the duration, and the pace.
Our additional answer is based on our own empirical research that focuses on how network companies currently deal with dilemmas between multiple public tasks.
The additional answer category "do not know" was also coded as the midpoint (score 1).
All items concerning knowledge had the additional answer option "don't know".
Finally, the last question ("were the previous two weeks representative for the rest of the year" with answer possibilities "Yes" and "No, I did less because…") received an additional answer possibility ("No, I did more because…").
Additional answers will be posted on Straight Sets throughout the Australian Open.
Because of publishing and editorial schedules, additional answers will be posted in mid-March.
The following article will give away some additional answers to Thursday's crossword puzzle in The New York Times.
Following is her third and final set of responses, with additional answers provided by her colleague, John Rowden, the associate director of citizen science and outreach for New York City Audubon.
Banks conducted some 100 interviews with African-Americans about their experiences with marriage and dating, and his findings guided him as he sought additional answers in the social science research.
