### Clue: Whale getting thinner finally, or the same topless? (7)
### Answer: RORQUAL 
 ### Explanation: Definition: Whale
 **The last letter of**(… finally) "thinner" + OR + "equal"(the same) **minus its 1st letter**(topless, in a down clue).
Defn:  A taxonomic family of whales, that include the blue whale.