What on earth was the MQM head honcho hinting at when he suggested that the army, the ISI and the MQM join hands?
Please sir explain this paragraph I tried my best to understand but I think it was not easy for me because I am on basic stage of learning English.
*** NOT A TEACHER ***
(IMHO, both the original question as well as my re-phrased version are quite straightforward to answer: he was hinting at those three organizations working together. Though there may be much more to that. )
As for "what on earth", "on earth" simply adds emphasis to "what". ("What the hell" and "what the f*ck" are also possible in colloquial conversations.)
I hope this helps.