Strange clue grasped by inventor over sugar compound (10)

I believe the answer is:

nucleoside

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

'sugar compound' is the definition.
'nucleoside' can be an answer for 'compound' (nucleoside is a kind of compound). I'm unsure of the 'sugar' bit.

'strange clue grasped by inventor over' is the wordplay.
'strange' indicates an anagram.
'grasped by' indicates putting letters inside (I've seen this in other clues).
'inventor' becomes 'edison' (Edison is an example).
'over' shows that the letters should be reversed in order.
'edison' backwards is 'noside'.
'clue' anagrammed gives 'ucle'.
'ucle' inserted within 'noside' is 'NUCLEOSIDE'.

Can you help me to learn more?

I've seen this clue in The Times.

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