Sheep eat oddly-laid flowers (6)
I believe the answer is:
tulips
'flowers' is the definition.
(I've seen this before)
'sheep eat oddly-laid' is the wordplay.
'sheep' becomes 'tups' ().
'eat' is an insertion indicator.
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
The alternate letters of 'laid' are 'li'.
'tups' going around 'li' is 'TULIPS'.
(Other definitions for tulips that I've seen before include "Garden flowers associated with Amsterdam" , "Pretty flowers, musically from Amsterdam" , "Perennial bulbs" , "Flowering bulbs" , "Popular flowers associated with Amsterdam" .)