The tag alias #55517 tugging_leash -> leash_pull has been approved.

Reason: They're synonyms. leash_pull: 4.2k images. tugging_leash: 28 images. Most recent is 21 days old. Precedent for this alias is leash_tug, which is aliased to leash_pull.

EDIT: The tag alias tugging_leash -> leash_pull (forum #321922) has been approved by @bitWolfy.