No, I believe there is no typo.
In the olden days, Ghazal* poets were in fierce competition with each other, especially those who did not see eye to eye and were hell bent to out do one another. So, if one wrote a Ghazal for which he was justly proud of, his rival would come up with his "جوابِ آن غزل" (a reply to that Ghazal). In the context provided the "action" (the first غزل, so to speak was a certain "step" taken by Mahatma Gandhi) and the "reaction" (جوابِ آن غزل was given by Maulana Shaukat Ali, in the form of getting his own report published).
* Ghazal poetry was the centre of rivalary because it was recited in "mushaa3iras" where other poets and cultured elite would be in attendance.