Tasty crop is back in hairdresser catalogues (5)
I believe the answer is:
cress
'tasty crop' is the definition.
The definition and answer can be both plants as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'back in hairdresser catalogues' is the wordplay.
'back' says the letters should be written in reverse.
'in' says the answer is hidden in the clue.
'sserc' is hidden within 'hairdresser catalogues'.
'sserc' in reverse letter order is 'CRESS'.
'is' is the link.
Can you help me to learn more?
(Other definitions for cress that I've seen before include "bit of salad" , "Plant with leaves used in salad or as garnish" , "Food item" , "Salad vegetable" , "Salad sprouts" .)