Indicate some newts e.g. Gussie returned (7)
I believe the answer is:
suggest
'indicate' is the definition.
('suggest' can be a synonym of 'indicate')
'some newts e g gussie returned' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'returned' says the letters should be written backwards.
'tseggus' is hidden within 'newts e g gussie'.
'tseggus' back-to-front is 'SUGGEST'.
(Other definitions for suggest that I've seen before include "Intimate" , "Put forward (an idea)" , "Offer advice or idea" , "Propose; imply" , "Put forward for consideration" .)