I don't use bacon in my recipes. What can I substitute for the flavor?

Try looking for smoked salt. Around here they have it at the food coop with the bulk spices. It makes everything smokey and delicious!

I'll agree with NeuB here. Liquid smoke (available in supermarkets) was the first thing that came to mind but smoked pimenton (paprika) is also a good suggestion.

Smoked turkey. It does wonders for recipes that call for bacon. One to one substitution. Its smokey, its salty, and leftovers can be used in a plethora of ways.

Pancetta or prosciutto. If it is a pork issue maybe add some white fish like cod or other white fish. It will still be satisfying with just the clams