A little lamb, or a growling layabout? (5)

I believe the answer is:

larry

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'a growling layabout?' is the definition.
I can't judge whether this defines the answer.

'a little lamb' is the wordplay.
'a little' becomes 'l' (abbreviation for little).
'lamb' becomes 'arry' (I am not sure about this - if you are sure you should believe this answer much more).
'l'+'arry'='LARRY'

'or' acts as a link.

Can you help me to learn more?

(Other definitions for larry that I've seen before include "Proverbially happy fellow" , "happy man" .)

I've seen this clue in the Evening Standard.

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