Crossword Genius

Aquatic mammal seen in play regularly — big draw? (7)

Ross

I believe the answer is:

lottery

I'm a little stuck... Click here to teach me more about this clue!

'big draw?' is the definition.
'lottery' can be an answer for 'draw?' (I've seen this before). I am not sure about the 'big' bit.

'aquatic mammal seen in play regularly' is the wordplay.
'aquatic mammal' becomes 'otter' (otters live by water).
'seen in' indicates putting letters inside.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'play' are 'ly'.
'otter' put within 'ly' is 'LOTTERY'.

Can you help me to learn more?

(Other definitions for lottery that I've seen before include "The random drawing of numbers from a drum" , "try his luck here" , "Chance process" , "chancy business" , "Sweepstake" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app