Withdraw for an hour when plunged into depression (6)
I believe the answer is:
shrink
'withdraw' is the definition.
(thesaurus)
'an hour when plunged into depression' is the wordplay.
I cannot quite see how this works, but
'an' could be 'i' (Roman numeral for one) and 'i' is present in the answer.
'hour' could be 'hr' (abbreviation) and 'hr' is found within the answer.
This explanation may well be incorrect...
'for' acts as a link.
Can you help me to learn more?
(Other definitions for shrink that I've seen before include "Diminish" , "Recoil from a slangy psychiatrist" , "Contract for a psychiatrist?" , "Lessen - mind expert?" , "Draw back from the psychiatrist?" .)