What does the cryptic crossword clue "Complaint about jerk being an MP (8)" mean?

The wordplay uses a container (one word inside another). TIC (synonym="jerk") in POLIO (synonym="complaint") = POLITICO The answer is POLITICO.

Complaint about jerk being an MP (8)

Guardian Cryptic #25714 | 27 Across | 2012-08-14 flower