Crossword Genius

Labour lass raised snail (7)

Ross

I believe the answer is:

laggard

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'snail' is the definition.
(thesaurus)

'labour lass raised' is the wordplay.
'labour' becomes 'drag' (I can't justify this - if you can you should give a lot more credence to this answer).
'lass' becomes 'gal' (I've seen this before).
'raised' says the letters should be written backwards.
'drag'+'gal'='draggal'
'draggal' in reverse letter order is 'LAGGARD'.

Can you help me to learn more?

(Other definitions for laggard that I've seen before include "One failing to keep up" , "Loiterer" , "who's getting behind?" , "slowcoach" , "Person falling behind" .)

I've seen this clue in The Telegraph.
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