Hot rock on radio for little six-footer? (5)
I believe the answer is:
larva
'little six-footer?' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'hot rock on radio' is the wordplay.
'hot rock' becomes 'lava' (I've seen this in another clue).
'on' means one lot of letters goes inside another (as in clothing 'on' a person).
'radio' becomes 'r' (this could be a standard abbreviation of which I'm unaware).
'lava' going around 'r' is 'LARVA'.
'for' is the link.
Can you help me to learn more?
(Other definitions for larva that I've seen before include "early form" , "shows form of immaturity" , "nit?" , "Immature form of caterpillar" , "Immature form of (insect) development" .)