noun
Often used in the pattern 〜の片鱗を見せる or 〜の片鱗をのぞかせる, meaning to show a small part or hint of something larger, such as talent, knowledge, or a hidden aspect.
彼の話し方に、深い教養の片鱗が見えた。
I caught a glimpse of his deep erudition in the way he spoke.
その作品には天才の片鱗
One can see a hint of genius in that work.
一端 also means 'a part' or 'one aspect', but is more neutral and concrete, while 片鱗 emphasizes a small, revealing glimpse of a larger whole.
片 (a piece) + 鱗 (scale, as of a fish). Literally 'a single scale', metaphorically a small part or glimpse of something larger.