Bond needed in companies' crowdfunding (6)
I believe the answer is:
escrow
'bond' is the definition.
(thesaurus)
'in companies' crowdfunding' is the wordplay.
'in' says the answer is hidden in the clue.
'ESCROW' is hidden in the letters of 'companies crowdfunding'.
'needed' acts as a link.
(Other definitions for escrow that I've seen before include "Something held until a condition is fulfilled" , "conditional execution of deed" , "Deed or deposit held until a condition is fulfilled" , "goods held by third party" , "Money held against completion" .)