Little Mexican legend with zip, so easy to miss one whizzing about (6,8)

'little mexican' is the definition.
(cartoon mouse)

'legend with zip so easy to miss one whizzing about' is the wordplay.
'with' says to put letters next to each other.
'to miss' indicates named letters should be taken away.
'one' becomes 'I' (Roman numeral).
'whizzing about' indicates an anagram (letters whizz around into new positions).
'zip'+'so'+'easy'='zipsoeasy'
'legend' put after 'zipsoeasy' is 'zipsoeasylegend'.
'zipsoeasylegend' with 'i' taken out is 'zpsoeasylegend'.
'zpsoeasylegend' anagrammed gives 'SPEEDY GONZALES'.