What does the cryptic crossword clue "Aunt is involved with police for pilfering (10)" mean?

The definition is "pilfering". The wordplay uses an anagram. anagram of AUNT + POLICE = PECULATION; definition: "pilfering" The answer is PECULATION.

Aunt is involved with police for pilfering (10)

Guardian Cryptic #29351 | 4 Down | 2024-04-08 flower