Fit together nicely (8)
(Other definitions for dovetail that I've seen before include "Kind of joint" , "Joint of tenon and mortise" , "good joint" , "Ali voted (anag) - joint" , "Wood joint" .)
'fit together nicely' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for mesh that I've seen before include "Interweave - netting" , "Become entangled - become engaged" , "Crossed wires" , "Get engaged" , "Lattice" .)