Stratford's uncovered grass (3)

I believe the answer is:

rat

'grass' is the definition.
(thesaurus)

'stratford's uncovered' is the wordplay.
'uncovered' says the answer is hidden in the clue.
'RAT' is hidden in the letters of 'stratford'.

(Other definitions for rat that I've seen before include "One deserting sinking ship" , "shopper" , "Rodent - deserter" , "one escaping doomed vessel?" , "Unpopular rodent" .)

I've seen this clue in The Guardian.

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