  Charged lepton flavour violation is reappraised in the context of
supersymmetric see-saw mechanism. It is pointed out that a non-trivial flavour
structure of right-handed neutrinos, whose effect has been thus far less
studied, can give rise to significant slepton flavour transitions. Under the
premise that the neutrino Yukawa couplings are of O(1), the right-handed
neutrino mixing contribution could form a basis of the $\mu \rightarrow e
\gamma$ amplitude which by itself might lead to an experimentally accessible
rate, given a typical low-energy sparticle spectrum. Emphasis is placed on the
crucial role of the recently measured lepton mixing angle $\theta_{13}$ as well
as the leptonic CP-violating phases.
