Take back the engineers' pamphlet (7)
I believe the answer is:
retract
'take back' is the definition.
(I've seen this before)
'engineers' pamphlet' is the wordplay.
'engineers'' becomes 'RE' (Royal Engineers).
'pamphlet' becomes 'tract' (synonyms).
're'+'tract'='RETRACT'
'the' is the link.
(Other definitions for retract that I've seen before include "Take back (statement)" , "Withdraw (offer, statement etc)" , "Take back or draw in" , "Reverse" , "Withdraw, take back" .)