It's a little hollow (4)

I believe the answer is:

dell

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

'hollow' is the definition.
(I know that dell is a type of hollow)

'it's a little' is the wordplay.
'it's' becomes 'del' (I can't justify this - if you can you should believe this answer much more).
'a little' becomes 'l' (abbreviation for little).
'del'+'l'='DELL'

Can you help me to learn more?

(Other definitions for dell that I've seen before include "Farmer's place, in song" , "Deep hollow or small valley" , "Small valley; computer company" , "Dingley - - , ('Pickwick Papers')" , "Small secluded valley" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.