We have performed an object tagging approach to identify boosted top quark decaying to electron or muon final state without an explicit use of the lepton. When top quark is produced with large transverse momentum, its daughter lepton has a hadronic activity in it's neighborhood, and hence standard lepton identification and isolation criteria are affected. We have come up with novel observables and used jet substructure information to tag the top quark in this scenario. We have also developed new variables which can distinguish the top quark from it's supersymmetric partner stop, when both of them decay to the same the final state consisting of lepton, b quark and missing energy. The performance is our tagger is evaluated using multivariate analysis at detector level.