I am so sorry for your loss 
Some names that have sound similarity and/ or letters in common with [name_m]Clive[/name_m]:
[name_f]Olive[/name_f]
[name_f]Clydie[/name_f]
[name_f]Clover[/name_f]
[name_f]Clove[/name_f]
[name_f]Clyda[/name_f]
[name_f]Clara[/name_f]
[name_f]Claire[/name_f]
I haven’t found any names yet sharing the meaning of ‘cliff’, but I’ll come back to add them if I do.
You could honour your dad by choosing a name related to one of his favourite things, a hobby, his birth stone or flower.
I hope you find a name you really like to honour your dad 