偵 is a Japanese kanji written with 11 strokes, listed here under the keyword “spy”. It is built from 亻 (person) and 貞 (upright). In Remembering the Kanji by James W. Heisig it is frame 1056.
On KumiJi Glyph Explorer, open the parts search and type “person” + “upright”. 偵 is among the results, together with every other character containing the same shapes.
Open 偵 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.