Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sūtēla, ae, f. [suo], prop. a sewing together; hence, trop., a cunning device or contrivance, an artifice, trick, wile (Plautin.): sutelae dolosae astutiae a similitudine suentium dictae, Fest. pp. 310 and 311 Müll.: ob sutelas tuas, Plaut. Capt. 3, 5, 34; id. Cas. 1, 7.