In summer I can find the heath (5)
I believe the answer is:
erica
'heath' is the definition.
(I know that erica is a type of heath)
'in summer i can find' is the wordplay.
'in' says the answer is hidden in the clue.
'ERICA' can be found hidden inside 'summer i can find'.
'the' acts as a link.
(Other definitions for erica that I've seen before include "Woman" , "hardy shrub" , "I care (anag) - plant - girl" , "found on the moors" , "Female" .)