Think drink has the foolish son in its clutches (8)
I believe the answer is:
consider
'think drink' is the definition.
'consider' can be an answer for 'think' (considering is a kind of thinking). I'm unsure of the 'drink' bit.
'the foolish son in its clutches' is the wordplay.
'the foolish' is an anagram indicator.
'son' becomes 's' (genealogical abbreviation for son).
'its' becomes 'coder' (I can't justify this - if you can you should believe this answer much more).
'clutches' is an insertion indicator.
's'+'in'='sin'
'sin' with letters rearranged gives 'nsi'.
'nsi' put within 'coder' is 'CONSIDER'.
'has' acts as a link.
Can you help me to learn more?
(Other definitions for consider that I've seen before include "Think about - judge" , "Muse, mull over" , "Reckon, deem" , "Deem to be, regard" , "Deem to be, believe" .)