It's wiser to dispense with telegrams (5)
I believe the answer is:
wires
'telegrams' is the definition.
(I've seen this in another clue)
'it's wiser to dispense' is the wordplay.
'wiser' can be anagrammed to 'WIRES'.
Though, I am not clear how this is indicated.
'with' is the link.
Can you help me to learn more?
(Other definitions for wires that I've seen before include "Metal threads" , "Cables; telegrams" , "Metal strands" .)