The bottoms have shiny reflection (5)
I believe the answer is:
keels
'the bottoms' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe there's a link between them I don't understand?
'shiny reflection' is the wordplay.
'shiny' becomes 'sleek ' (I've seen this before).
'reflection' says the letters should be written backwards.
'sleek' reversed gives 'KEELS'.
'have' acts as a link.
Can you help me to learn more?
(Other definitions for keels that I've seen before include "Parts of ships" , "bases of vessels" .)