I can't comment on the likelihood of Stuckless being derived from Stuckley, but you might be interested to know that in the 1851 Census for Winterborne Came, Dorset, there is a William Stuckley listed, age 16, born Jersey. (I am investigating him as he is a candidate for my ancestor, William Richard
Stuckey, born 1835-1838, who emigrated to New Zealand in the late 1850s.)