Crossword Genius

Wife loves student's coat (4)

Ross

I believe the answer is:

wool

'coat' is the definition.
(I know that wool is a type of coat)

'wife loves student's' is the wordplay.
'wife' becomes 'w' (abbreviation).
'loves' becomes 'oo' (love means 0 in tennis).
'student' becomes 'l' (as in L-plates for learner drivers).
'w'+'oo'+'l'='WOOL'

(Other definitions for wool that I've seen before include "Hair of sheep etc" , "Sheep's clothing" , "Fabric from fleece" , "What can be pulled over eyes to deceive" , "Fabric made from animal hair" .)

I've seen this clue in The Telegraph.
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