Help With Parsing Please

[michaeljhoward]

Observer crossword No. 3907

Blunder, as tin-eared poet may? (3,1,4,5)
Leading car brand announced:old explorer (5,4)
I have 'Put a foot wrong' and 'Marco Polo' respectively but cannot parse. Thanks in advance

[JimF]

Traditional poetry is written in feet:
https://en.wikipedia.org/wiki/Foot_(prosody)

[Mamyalynne]

1 Foot/feet are poetry terms, hence a poor hearing Poet may get rhyme wrong.

[JimF]

Car brand = Polo
Brand announced = Marc (sounds like marque)
O = old

[Mamyalynne]

2 Marque (sounds like) O(ld) Polo (Car)

[Lie-in King]

https://www.collinsdictionary.com/dictionary/english/foot

14. prosody a group of two or more syllables in which one syllable has the major stress, forming the basic unit of poetic rhythm

Marco Polo - "marque" (brand, announced) + 'o(ld)' (leading; first) + 'Polo' (car)

[JimF]

Got there in the end! :-)