What does the cryptic crossword clue "Steal the Spanish coin (6)" mean?

The definition is "coin". The wordplay uses a charade (building blocks). NICK (synonym="Steal") + EL (abbreviation="Spanish") = NICKEL; definition: "coin" The answer is Nickel.

Steal the Spanish coin (6)

Telegraph #28444 | 4 Down | 2017-06-03 flower

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Also seen in

Guardian Cryptic #25765 (2012-10-12) Daily Mail Cryptic #16829 (2022-05-04)