Considerable part of molecular genetics (5)

I believe the answer is:

large

'considerable' is the definition.
(I've seen this before)

'part of molecular genetics' is the wordplay.
'part of' indicates a hidden word.
'LARGE' is hidden within 'molecular genetics'.

(Other definitions for large that I've seen before include "Tall" , "Big - 5 down (anag)" , "Of great size" , "Great being regal" , "Sizable" .)

I've seen this clue in The Everyman puzzle in The Observer.

Want a hint initially instead of a full solution? Install my app