Crossword Genius

Watchful dog almost yields from time to time (5-4)

Ross

I believe the answer is:

sharp-eyed

I'm a little stuck... Click here to teach me more about this clue!

'watchful' is the definition.
(thesaurus)

'dog almost yields from time to time' is the wordplay.
'dog almost' becomes 'sharpe' (I can't explain this - if you can you should give a lot more credence to this answer).
'from time to time' indicates alternate letters (letters removed on a regular basis).
The alternating letters of 'yields' are 'yed'.
'sharpe'+'yed'='SHARP-EYED'

Can you help me to learn more?

(Another definition for sharp-eyed that I've seen is " Quick to notice".)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app