The space agency, as a first step towards realising a Two-Stage To Orbit (TSTO) re-usable launch vehicle, has developed a winged RLV-TD....The RLV-TD will act as a flying test-bed to evaluate various technologies — hypersonic flight, autonomous landing, powered cruise flight and hypersonic flight using air breathing propulsion.The first in the series of trials is the hypersonic flight experiment (HEX) followed by the landing experiment (LEX), return flight experiment (REX) and scramjet propulsion experiment (SPEX).During HEX, the vehicle will take lift off in the form of a rocket with a booster. Later, it can be recovered from sea.
So, it sounds like a two-stage vehicle, with a scramjet-powered recoverable first stage and a winged orbiter for a second stage.