Crossword Genius

Big celebrity gets Mara excited (8)

Ross

I believe the answer is:

megastar

Here is my best explanation:

'big celebrity' is the definition.

'gets mara excited' is the wordplay.
'excited' indicates an anagram.
'gets'+'mara'='getsmara'
'getsmara' with letters rearranged gives 'MEGASTAR'.

This clue was last seen in The Times