The bonds between P atoms and $Cl$  atoms in $PC{l}_5$   are likely to be

The bonds between P atoms and Cl atoms in PCl₅ are likely to be covalent with some ionic character.

PCl₅ is a covalent compound but in its solid form it behaves like a ionic compound ${\mathrm{PCl}}_4^{-}$ and ${\mathrm{PCl}}_6^{+}$